Feat: add CometAPI to LLMFactory and update related mappings (#10119)

### Related issues
#10078

### What problem does this PR solve?
Integrate CometAPI provider.

### Type of change

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

rag/llm/chat_model.py

@@ -1356,6 +1356,15 @@ class Ai302Chat(Base):
         super().__init__(key, model_name, base_url, **kwargs)
 
 
+class CometChat(Base):
+    _FACTORY_NAME = "CometAPI"
+
+    def __init__(self, key, model_name, base_url="https://api.cometapi.com/v1", **kwargs):
+        if not base_url:
+            base_url = "https://api.cometapi.com/v1"
+        super().__init__(key, model_name, base_url, **kwargs)
+
+
 class TokenPonyChat(Base):
     _FACTORY_NAME = "TokenPony"
 

rag/llm/embedding_model.py

@@ -958,3 +958,12 @@ class Ai302Embed(Base):
         if not base_url:
             base_url = "https://api.302.ai/v1/embeddings"
         super().__init__(key, model_name, base_url)
+
+
+class CometEmbed(Base):
+    _FACTORY_NAME = "CometAPI"
+
+    def __init__(self, key, model_name, base_url="https://api.cometapi.com/v1/embeddings"):
+        if not base_url:
+            base_url = "https://api.cometapi.com/v1/embeddings"
+        super().__init__(key, model_name, base_url)

rag/llm/sequence2txt_model.py

@@ -234,3 +234,13 @@ class DeepInfraSeq2txt(Base):
 
         self.client = OpenAI(api_key=key, base_url=base_url)
         self.model_name = model_name
+        
+        
+class CometSeq2txt(Base):
+    _FACTORY_NAME = "CometAPI"
+
+    def __init__(self, key, model_name="whisper-1", base_url="https://api.cometapi.com/v1", **kwargs):
+        if not base_url:
+            base_url = "https://api.cometapi.com/v1"
+        self.client = OpenAI(api_key=key, base_url=base_url)
+        self.model_name = model_name

rag/llm/tts_model.py

@@ -394,3 +394,11 @@ class DeepInfraTTS(OpenAITTS):
         if not base_url:
             base_url = "https://api.deepinfra.com/v1/openai"
         super().__init__(key, model_name, base_url, **kwargs)
+        
+class CometAPITTS(OpenAITTS):
+    _FACTORY_NAME = "CometAPI"
+
+    def __init__(self, key, model_name, base_url="https://api.cometapi.com/v1", **kwargs):
+        if not base_url:
+            base_url = "https://api.cometapi.com/v1"
+        super().__init__(key, model_name, base_url, **kwargs)