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

web/src/constants/llm.ts

@@ -56,6 +56,7 @@ export enum LLMFactory {
   XAI = 'xAI',
   TokenPony = 'TokenPony',
   Meituan = 'Meituan',
+  CometAPI = 'CometAPI',
 }
 
 // Please lowercase the file name
@@ -117,4 +118,5 @@ export const IconMap = {
   [LLMFactory.XAI]: 'xai',
   [LLMFactory.TokenPony]: 'token-pony',
   [LLMFactory.Meituan]: 'longcat',
+  [LLMFactory.CometAPI]: 'cometapi',
 };