fix: Add installer dependencies to root package.json

- Adds chalk, fs-extra, inquirer, ora for installer functionality
- Fixes MODULE_NOT_FOUND errors when running via npx

🤖 Generated with [Claude Code](https://claude.ai/code)

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

package.json

@@ -17,7 +17,11 @@
   "dependencies": {
     "commander": "^9.4.1",
     "js-yaml": "^4.1.0",
-    "@kayvan/markdown-tree-parser": "^1.4.2"
+    "@kayvan/markdown-tree-parser": "^1.4.2",
+    "chalk": "^4.1.2",
+    "fs-extra": "^11.1.0",
+    "inquirer": "^8.2.5",
+    "ora": "^5.4.1"
   },
   "keywords": [
     "agile",