* Update devcontainer.
* Switch module settings, turn on `noEmit`, and drop explicit `lib`.
* module->namespace
* Switch troublesome packages to use `import = require()` syntax.
* Remove unnecessary declaration file.
* Drop DOM declarations.
* Fix up errors from more restrictive signature of `vscode.l10n.t`.
* Fix chat-lib script - we no longer have that stray file.
* Update dependencies.
- Updated `devcontainer.json` to ensure `git-lfs` is initialized on container creation.
- Modified `postinstall.ts` to adjust the `REPO_ROOT` path for better directory structure.