Initial monorepo setup with npm workspaces and dual TypeScript configuration

- Set up npm workspaces for three packages: pi-tui, pi-agent, and pi (pods)
- Implemented dual TypeScript configuration:
  - Root tsconfig.json with path mappings for development and type checking
  - Package-specific tsconfig.build.json for clean production builds
- Configured lockstep versioning with sync script for inter-package dependencies
- Added comprehensive documentation for development and publishing workflows
- All packages at version 0.5.0 ready for npm publishing

.gitignore

@@ -0,0 +1,24 @@
+node_modules/
+dist/
+*.log
+.DS_Store
+*.tsbuildinfo
+packages/*/node_modules/
+packages/*/dist/
+
+# Environment
+.env
+
+# Editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Package specific
+.npm/
+coverage/
+.nyc_output/
+.pi_config/
+tui-debug.log