Fix twenty cli (#15997)

As title

fixes "app add" and "app init" commands
adds tests

packages/twenty-cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "twenty-cli",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "Command-line interface for Twenty application development",
   "main": "dist/cli.js",
   "bin": {
@@ -40,6 +40,7 @@
     "lodash.camelcase": "^4.3.0",
     "lodash.capitalize": "^4.2.1",
     "lodash.kebabcase": "^4.1.1",
+    "lodash.startcase": "^4.4.0",
     "typescript": "^5.9.2",
     "uuid": "^13.0.0"
   },
@@ -50,6 +51,7 @@
     "@types/lodash.camelcase": "^4.3.7",
     "@types/lodash.capitalize": "^4",
     "@types/lodash.kebabcase": "^4.1.7",
+    "@types/lodash.startcase": "^4",
     "@types/node": "^20.0.0",
     "jest": "^29.5.0",
     "tsx": "^4.7.0",