feat: overhaul CLI UI with @clack/prompts and listr2

- init: replace readline with @clack/prompts (text, select, confirm, group)
- setup: replace info/success pairs with listr2 task list
- deploy: clack spinner + note box, better dry-run with ui.note
- prompt.ts: confirm() uses @clack/prompts
- ui.ts: rewritten around @clack/prompts primitives
- help: banner via clack intro

Author: devalade

package.json

@@ -27,12 +27,14 @@
     "prepublishOnly": "pnpm lint && pnpm test && pnpm build"
   },
   "dependencies": {
+    "@clack/prompts": "^1.4.0",
     "chalk": "^5.3.0",
     "commander": "^12.1.0",
     "execa": "^9.5.1",
     "fs-extra": "^11.3.5",
     "jiti": "^2.4.2",
     "js-yaml": "^4.1.0",
+    "listr2": "^10.2.1",
     "ora": "^8.1.1",
     "ssh2": "^1.16.0",
     "zod": "^3.24.1"