Enhance `LLMNode` with multimodal capability, introducing support for
image outputs.

This implementation extracts base64-encoded images from LLM responses,
saves them to the storage service, and records the file metadata in the
`ToolFile` table. In conversations, these images are rendered as
markdown-based inline images.
Additionally, the images are included in the LLMNode's output as
file variables, enabling subsequent nodes in the workflow to utilize them.

To integrate file outputs into workflows, adjustments to the frontend code
are necessary.

For multimodal output functionality, updates to related model configurations
are required. Currently, this capability has been applied exclusively to
Google's Gemini models.

Close #15814.

Signed-off-by: -LAN- <laipz8200@outlook.com>
Co-authored-by: -LAN- <laipz8200@outlook.com>

Co-authored-by: StoneFancyX <kindbin@qq.com>
Co-authored-by: crazywoola <427733928@qq.com>

Co-authored-by: crazywoola <427733928@qq.com>

Signed-off-by: yihong0618 <zouzou0208@gmail.com>
Signed-off-by: -LAN- <laipz8200@outlook.com>
Signed-off-by: xhe <xw897002528@gmail.com>
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: takatost <takatost@gmail.com>
Co-authored-by: kurokobo <kuro664@gmail.com>
Co-authored-by: Novice Lee <novicelee@NoviPro.local>
Co-authored-by: zxhlyh <jasonapring2015@outlook.com>
Co-authored-by: AkaraChen <akarachen@outlook.com>
Co-authored-by: Yi <yxiaoisme@gmail.com>
Co-authored-by: Joel <iamjoel007@gmail.com>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: twwu <twwu@dify.ai>
Co-authored-by: Hiroshi Fujita <fujita-h@users.noreply.github.com>
Co-authored-by: AkaraChen <85140972+AkaraChen@users.noreply.github.com>
Co-authored-by: NFish <douxc512@gmail.com>
Co-authored-by: Wu Tianwei <30284043+WTW0313@users.noreply.github.com>
Co-authored-by: 非法操作 <hjlarry@163.com>
Co-authored-by: Novice <857526207@qq.com>
Co-authored-by: Hiroki Nagai <82458324+nagaihiroki-git@users.noreply.github.com>
Co-authored-by: Gen Sato <52241300+halogen22@users.noreply.github.com>
Co-authored-by: eux <euxuuu@gmail.com>
Co-authored-by: huangzhuo1949 <167434202+huangzhuo1949@users.noreply.github.com>
Co-authored-by: huangzhuo <huangzhuo1@xiaomi.com>
Co-authored-by: lotsik <lotsik@mail.ru>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: nite-knite <nkCoding@gmail.com>
Co-authored-by: Jyong <76649700+JohnJyong@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: gakkiyomi <gakkiyomi@aliyun.com>
Co-authored-by: CN-P5 <heibai2006@gmail.com>
Co-authored-by: CN-P5 <heibai2006@qq.com>
Co-authored-by: Chuehnone <1897025+chuehnone@users.noreply.github.com>
Co-authored-by: yihong <zouzou0208@gmail.com>
Co-authored-by: Kevin9703 <51311316+Kevin9703@users.noreply.github.com>
Co-authored-by: -LAN- <laipz8200@outlook.com>
Co-authored-by: Boris Feld <lothiraldan@gmail.com>
Co-authored-by: mbo <himabo@gmail.com>
Co-authored-by: mabo <mabo@aeyes.ai>
Co-authored-by: Warren Chen <warren.chen830@gmail.com>
Co-authored-by: JzoNgKVO <27049666+JzoNgKVO@users.noreply.github.com>
Co-authored-by: jiandanfeng <chenjh3@wangsu.com>
Co-authored-by: zhu-an <70234959+xhdd123321@users.noreply.github.com>
Co-authored-by: zhaoqingyu.1075 <zhaoqingyu.1075@bytedance.com>
Co-authored-by: 海狸大師 <86974027+yenslife@users.noreply.github.com>
Co-authored-by: Xu Song <xusong.vip@gmail.com>
Co-authored-by: rayshaw001 <396301947@163.com>
Co-authored-by: Ding Jiatong <dingjiatong@gmail.com>
Co-authored-by: Bowen Liang <liangbowen@gf.com.cn>
Co-authored-by: JasonVV <jasonwangiii@outlook.com>
Co-authored-by: le0zh <newlight@qq.com>
Co-authored-by: zhuxinliang <zhuxinliang@didiglobal.com>
Co-authored-by: k-zaku <zaku99@outlook.jp>
Co-authored-by: luckylhb90 <luckylhb90@gmail.com>
Co-authored-by: hobo.l <hobo.l@binance.com>
Co-authored-by: jiangbo721 <365065261@qq.com>
Co-authored-by: 刘江波 <jiangbo721@163.com>
Co-authored-by: Shun Miyazawa <34241526+miya@users.noreply.github.com>
Co-authored-by: EricPan <30651140+Egfly@users.noreply.github.com>
Co-authored-by: crazywoola <427733928@qq.com>
Co-authored-by: sino <sino2322@gmail.com>
Co-authored-by: Jhvcc <37662342+Jhvcc@users.noreply.github.com>
Co-authored-by: lowell <lowell.hu@zkteco.in>
Co-authored-by: Boris Polonsky <BorisPolonsky@users.noreply.github.com>
Co-authored-by: Ademílson Tonato <ademilsonft@outlook.com>
Co-authored-by: Ademílson Tonato <ademilson.tonato@refurbed.com>
Co-authored-by: IWAI, Masaharu <iwaim.sub@gmail.com>
Co-authored-by: Yueh-Po Peng (Yabi) <94939112+y10ab1@users.noreply.github.com>
Co-authored-by: Jason <ggbbddjm@gmail.com>
Co-authored-by: Xin Zhang <sjhpzx@gmail.com>
Co-authored-by: yjc980121 <3898524+yjc980121@users.noreply.github.com>
Co-authored-by: heyszt <36215648+hieheihei@users.noreply.github.com>
Co-authored-by: Abdullah AlOsaimi <osaimiacc@gmail.com>
Co-authored-by: Abdullah AlOsaimi <189027247+osaimi@users.noreply.github.com>
Co-authored-by: Yingchun Lai <laiyingchun@apache.org>
Co-authored-by: Hash Brown <hi@xzd.me>
Co-authored-by: zuodongxu <192560071+zuodongxu@users.noreply.github.com>
Co-authored-by: Masashi Tomooka <tmokmss@users.noreply.github.com>
Co-authored-by: aplio <ryo.091219@gmail.com>
Co-authored-by: Obada Khalili <54270856+obadakhalili@users.noreply.github.com>
Co-authored-by: Nam Vu <zuzoovn@gmail.com>
Co-authored-by: Kei YAMAZAKI <1715090+kei-yamazaki@users.noreply.github.com>
Co-authored-by: TechnoHouse <13776377+deephbz@users.noreply.github.com>
Co-authored-by: Riddhimaan-Senapati <114703025+Riddhimaan-Senapati@users.noreply.github.com>
Co-authored-by: MaFee921 <31881301+2284730142@users.noreply.github.com>
Co-authored-by: te-chan <t-nakanome@sakura-is.co.jp>
Co-authored-by: HQidea <HQidea@users.noreply.github.com>
Co-authored-by: Joshbly <36315710+Joshbly@users.noreply.github.com>
Co-authored-by: xhe <xw897002528@gmail.com>
Co-authored-by: weiwenyan-dev <154779315+weiwenyan-dev@users.noreply.github.com>
Co-authored-by: ex_wenyan.wei <ex_wenyan.wei@tcl.com>
Co-authored-by: engchina <12236799+engchina@users.noreply.github.com>
Co-authored-by: engchina <atjapan2015@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: 呆萌闷油瓶 <253605712@qq.com>
Co-authored-by: Kemal <kemalmeler@outlook.com>
Co-authored-by: Lazy_Frog <4590648+lazyFrogLOL@users.noreply.github.com>
Co-authored-by: Yi Xiao <54782454+YIXIAO0@users.noreply.github.com>
Co-authored-by: Steven sun <98230804+Tuyohai@users.noreply.github.com>
Co-authored-by: steven <sunzwj@digitalchina.com>
Co-authored-by: Kalo Chin <91766386+fdb02983rhy@users.noreply.github.com>
Co-authored-by: Katy Tao <34019945+KatyTao@users.noreply.github.com>
Co-authored-by: depy <42985524+h4ckdepy@users.noreply.github.com>
Co-authored-by: 胡春东 <gycm520@gmail.com>
Co-authored-by: Junjie.M <118170653@qq.com>
Co-authored-by: MuYu <mr.muzea@gmail.com>
Co-authored-by: Naoki Takashima <39912547+takatea@users.noreply.github.com>
Co-authored-by: Summer-Gu <37869445+gubinjie@users.noreply.github.com>
Co-authored-by: Fei He <droxer.he@gmail.com>
Co-authored-by: ybalbert001 <120714773+ybalbert001@users.noreply.github.com>
Co-authored-by: Yuanbo Li <ybalbert@amazon.com>
Co-authored-by: douxc <7553076+douxc@users.noreply.github.com>
Co-authored-by: liuzhenghua <1090179900@qq.com>
Co-authored-by: Wu Jiayang <62842862+Wu-Jiayang@users.noreply.github.com>
Co-authored-by: Your Name <you@example.com>
Co-authored-by: kimjion <45935338+kimjion@users.noreply.github.com>
Co-authored-by: AugNSo <song.tiankai@icloud.com>
Co-authored-by: llinvokerl <38915183+llinvokerl@users.noreply.github.com>
Co-authored-by: liusurong.lsr <liusurong.lsr@alibaba-inc.com>
Co-authored-by: Vasu Negi <vasu-negi@users.noreply.github.com>
Co-authored-by: Hundredwz <1808096180@qq.com>
Co-authored-by: Xiyuan Chen <52963600+GareArc@users.noreply.github.com>

Signed-off-by: -LAN- <laipz8200@outlook.com>

Co-authored-by: Poorandy <andymonicamua1@gmail.com>

Co-authored-by: Joel <iamjoel007@gmail.com>
Co-authored-by: Yeuoly <admin@srmxy.cn>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: StyleZhang <jasonapring2015@outlook.com>
Co-authored-by: jyong <jyong@dify.ai>
Co-authored-by: nite-knite <nkCoding@gmail.com>
Co-authored-by: jyong <718720800@qq.com>

Co-authored-by: chenhe <guchenhe@gmail.com>
Co-authored-by: Pascal M <11357019+perzeuss@users.noreply.github.com>