refactor: update import statements to use .js extensions

- Changed all import statements across the project to include the .js extension for consistency and to comply with ES module standards.
- Updated imports in various files including bootstrap.ts, shutdown.ts, config.ts, and many others.
- Ensured that all related modules and types are correctly imported with the new extension.

src/routes/uiStateRoutes.ts

@@ -1,6 +1,6 @@
 import type { Router } from "express";
 import express from "express";
-import type { SharedUIState, SharedUIStatePatch } from "../state/uiState";
+import type { SharedUIState, SharedUIStatePatch } from "../state/uiState.js";
 
 export { SharedUIState, SharedUIStatePatch };