Implement settings service and routes for file-based settings management

- Add SettingsService to handle reading/writing global and project settings.
- Introduce API routes for managing settings, including global settings, credentials, and project-specific settings.
- Implement migration functionality to transfer settings from localStorage to file-based storage.
- Create common utilities for settings routes and integrate logging for error handling.
- Update server entry point to include new settings routes.

apps/server/src/routes/settings/common.ts

@@ -0,0 +1,15 @@
+/**
+ * Common utilities for settings routes
+ */
+
+import { createLogger } from "../../lib/logger.js";
+import {
+  getErrorMessage as getErrorMessageShared,
+  createLogError,
+} from "../common.js";
+
+export const logger = createLogger("Settings");
+
+// Re-export shared utilities
+export { getErrorMessageShared as getErrorMessage };
+export const logError = createLogError(logger);