feat(fake-llm-server): add initial setup for fake LLM server with TypeScript and Express

- Created package.json for dependencies and scripts
- Added tsconfig.json for TypeScript configuration
- Implemented fake stdio MCP server with basic calculator and environment variable printing tools
- Added shell script to run the fake stdio MCP server
- Updated root tsconfig.json for project references and path mapping

backups/backup-20251218-161645/git-status.txt

@@ -0,0 +1,9 @@
+On branch main
+Your branch is ahead of 'origin/main' by 6 commits.
+  (use "git push" to publish your local commits)
+
+Untracked files:
+  (use "git add <file>..." to include in what will be committed)
+	backups/backup-20251218-161645/
+
+nothing added to commit but untracked files present (use "git add" to track)