add support for Upstage (#1902)

### What problem does this PR solve?

#1853  add support for Upstage

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

Co-authored-by: Zhedong Cen <cenzhedong2@126.com>

conf/llm_factories.json

                     "model_type": "embedding"
                 }
             ]
+        },
+        {
+            "name": "Upstage",
+            "logo": "",
+            "tags": "LLM,TEXT EMBEDDING",
+            "status": "1",
+            "llm": [
+                {
+                    "llm_name": "solar-1-mini-chat",
+                    "tags": "LLM,CHAT,32k",
+                    "max_tokens": 32768,
+                    "model_type": "chat"
+                },
+                {
+                    "llm_name": "solar-1-mini-chat-ja",
+                    "tags": "LLM,CHAT,32k",
+                    "max_tokens": 32768,
+                    "model_type": "chat"
+                },
+                {
+                    "llm_name": "solar-embedding-1-large-query",
+                    "tags": "TEXT EMBEDDING",
+                    "max_tokens": 4000,
+                    "model_type": "embedding"
+                },
+                {
+                    "llm_name": "solar-embedding-1-large-passage",
+                    "tags": "TEXT EMBEDDING",
+                    "max_tokens": 4000,
+                    "model_type": "embedding"
+                }
+            ]
         }
     ]
 }

rag/llm/__init__.py

     "cohere": CoHereEmbed,
     "TogetherAI": TogetherAIEmbed,
     "PerfXCloud": PerfXCloudEmbed,
+    "Upstage": UpstageEmbed
 }
 
 
     "cohere": CoHereChat,
     "LeptonAI": LeptonAIChat,
     "TogetherAI": TogetherAIChat,
-    "PerfXCloud": PerfXCloudChat
+    "PerfXCloud": PerfXCloudChat,
+    "Upstage":UpstageChat
 }
 
 

rag/llm/chat_model.py

         if not base_url:
             base_url = "https://cloud.perfxlab.cn/v1"
         super().__init__(key, model_name, base_url)
+
+
+class UpstageChat(Base):
+    def __init__(self, key, model_name, base_url="https://api.upstage.ai/v1/solar"):
+        if not base_url:
+            base_url = "https://api.upstage.ai/v1/solar"
+        super().__init__(key, model_name, base_url)

rag/llm/embedding_model.py

         if not base_url:
             base_url = "https://cloud.perfxlab.cn/v1"
         super().__init__(key, model_name, base_url)
-        
+
+
+class UpstageEmbed(OpenAIEmbed):
+    def __init__(self, key, model_name, base_url="https://api.upstage.ai/v1/solar"):
+        if not base_url:
+            base_url = "https://api.upstage.ai/v1/solar"
+        super().__init__(key, model_name, base_url)

web/src/pages/user-setting/setting-model/constant.ts

   cohere: 'cohere',
   Lepton: 'lepton',
   TogetherAI:'together-ai',
-  PerfXCould: 'perfx-could'
+  PerfXCould: 'perfx-could',
+  Upstage: 'upstage'
 };
 
 export const BedrockRegionList = [