Refactor CLI Config Manager and Add Provider Model Routes

- Removed deprecated constants and functions from cli-config-manager.ts.
- Introduced new provider model presets in litellm-provider-models.ts for better organization and management of model information.
- Created provider-routes.ts to handle API endpoints for retrieving provider information and models.
- Added integration tests for provider routes to ensure correct functionality and response structure.
- Implemented unit tests for settings persistence functions, covering various scenarios and edge cases.
- Enhanced error handling and validation in the new routes and settings functions.

ccw/src/core/routes/cli-routes.ts

@@ -29,8 +29,7 @@ import {
   loadCliConfig,
   getToolConfig,
   updateToolConfig,
-  getFullConfigResponse,
-  PREDEFINED_MODELS
+  getFullConfigResponse
 } from '../../tools/cli-config-manager.js';
 import {
   loadClaudeCliTools,