### What problem does this PR solve?

fix: cannot save the system model setting #468
feat: rename file in FileManager
feat: add FileManager
feat: override useSelector type

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

* feat: download documents on the document list page

* feat: add tooltip to Form.Item

* feat: set font family to inter

* feat: add loading to ChatContainer

* feat: Fixed the issue where the greeting would disappear when clicking on a new dialog

* feat: replace favicon with logo.svg

* feat: if the backend returns 401, it will jump to the login page.

* feat: unavailable llm models appear disabled

* feat: display chunk token number when category of knowledge as general

* feat: fixed the issue where ChatConfigurationModal displays old data when creating a new dialog

* feat: Add Skeleton to MessageItem before the backend returns a message

* feat: remove react-pdf

* feat: add Skeleton to Preview of document

* feat: set width of chunk text to 100%

* feat: add DocumentPreview

* feat: display all pdf pages

* feat: add nginx.conf

* feat: modify the root path of the web

* feat: remove unnecessary 'loading' fields from other files

* feat: layout the knowledge list page

* feat: modify the page switching button in the header

* feat: add react-dev-inspector to locate code in the IDE faster

* feat: install prettier to format code

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Co-authored-by: yangqianjuan <1072483500@qq.com>

* update typescript

* add chunk api

* remove useless code