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/server.ts

@@ -8,6 +8,7 @@ import { resolvePath, getRecentPaths, normalizePathForDisplay } from '../utils/p
 import { handleStatusRoutes } from './routes/status-routes.js';
 import { handleCliRoutes, cleanupStaleExecutions } from './routes/cli-routes.js';
 import { handleCliSettingsRoutes } from './routes/cli-settings-routes.js';
+import { handleProviderRoutes } from './routes/provider-routes.js';
 import { handleMemoryRoutes } from './routes/memory-routes.js';
 import { handleCoreMemoryRoutes } from './routes/core-memory-routes.js';
 import { handleMcpRoutes } from './routes/mcp-routes.js';
@@ -518,6 +519,11 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser
         if (await handleCliRoutes(routeContext)) return;
       }
 
+      // Provider routes (/api/providers/*)
+      if (pathname.startsWith('/api/providers')) {
+        if (await handleProviderRoutes(routeContext)) return;
+      }
+
       // Claude CLAUDE.md routes (/api/memory/claude/*) and Language routes (/api/language/*)
       if (pathname.startsWith('/api/memory/claude/') || pathname.startsWith('/api/language/')) {
         if (await handleClaudeRoutes(routeContext)) return;