chore: add npm script for TUI command

Adds 'npm run tui' as shorthand for 'tsx src/index.ts tui'

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -12,6 +12,7 @@
     "start": "node dist/index.js",
     "dev": "tsx src/index.ts",
     "web": "node dist/index.js web",
+    "tui": "tsx src/index.ts tui",
     "clean": "rm -rf dist",
     "test": "vitest run",
     "test:watch": "vitest",