chore: optimize package.json descriptions for npm discoverability

Improve descriptions across all packages to include key differentiators
(Yoga flexbox, AI agent, React Ink lineage) and rename workspace root
from vue-tui to vue-tui-monorepo to avoid confusion with the taken npm name.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/cli/package.json

@@ -1,6 +1,7 @@
 {
   "name": "@vue-tui/cli",
   "version": "0.0.1",
+  "description": "Scaffold and develop Vue 3 terminal apps with Yoga flexbox layout.",
   "bin": {
     "vue-tui": "./dist/index.mjs"
   },