1750 extensibility twenty sdk v2 use twenty sdk to define an object (#15230)

We maintain jsonc object definition but will deprecate them pretty soon

## Before
<img width="1512" height="575" alt="image"
src="https://github.com/user-attachments/assets/d2fa6ca4-c456-4aa9-a1e3-845b61839718"
/>

## After
<img width="1260" height="555" alt="image"
src="https://github.com/user-attachments/assets/ba72f4cf-d443-4967-913c-029bc71f3f48"
/>

packages/twenty-cli/src/constants/base-application-project/.gitignore

@@ -0,0 +1,5 @@
+# Duplicated with ./gitignore because npm publish does not include .gitignore
+# https://github.com/npm/npm/issues/3763
+
+.yarn/install-state.gz
+.env

packages/twenty-cli/src/constants/base-application-project/package.json

@@ -7,6 +7,9 @@
     "yarn": ">=4.0.2"
   },
   "packageManager": "yarn@4.9.2",
+  "dependencies": {
+    "twenty-sdk": "^0.0.2"
+  },
   "devDependencies": {
     "@types/node": "^24.7.2"
   }

packages/twenty-cli/src/constants/base-application-project/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "sourceMap": true,
+    "declaration": true,
+    "outDir": "./dist",
+    "rootDir": ".",
+    "moduleResolution": "node",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "importHelpers": true,
+    "strict": true,
+    "target": "es2018",
+    "module": "esnext",
+    "lib": ["es2020", "dom"],
+    "skipLibCheck": true,
+    "skipDefaultLibCheck": true,
+    "resolveJsonModule": true
+  },
+  "exclude": ["node_modules", "dist"],
+  "include": ["**/*.ts"]
+}

packages/twenty-cli/src/constants/base-application-project/yarn.lock

@@ -0,0 +1,38 @@
+# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
+__metadata:
+  version: 8
+  cacheKey: 10c0
+
+"@types/node@npm:^24.7.2":
+  version: 24.9.1
+  resolution: "@types/node@npm:24.9.1"
+  dependencies:
+    undici-types: "npm:~7.16.0"
+  checksum: 10c0/c52f8168080ef9a7c3dc23d8ac6061fab5371aad89231a0f6f4c075869bc3de7e89b075b1f3e3171d9e5143d0dda1807c3dab8e32eac6d68f02e7480e7e78576
+  languageName: node
+  linkType: hard
+
+"root-workspace-0b6124@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "root-workspace-0b6124@workspace:."
+  dependencies:
+    "@types/node": "npm:^24.7.2"
+    twenty-sdk: "npm:^0.0.2"
+  languageName: unknown
+  linkType: soft
+
+"twenty-sdk@npm:^0.0.2":
+  version: 0.0.2
+  resolution: "twenty-sdk@npm:0.0.2"
+  checksum: 10c0/99e6fe86059d847b548c1f03e0f0c59a4d540caf1d28dd4500f1f5f0094196985ded955801274de9e72ff03e3d1f41e9a509b4c2c5a02ffc8a027277b1e35d8e
+  languageName: node
+  linkType: hard
+
+"undici-types@npm:~7.16.0":
+  version: 7.16.0
+  resolution: "undici-types@npm:7.16.0"
+  checksum: 10c0/3033e2f2b5c9f1504bdc5934646cb54e37ecaca0f9249c983f7b1fc2e87c6d18399ebb05dc7fd5419e02b2e915f734d872a65da2e3eeed1813951c427d33cc9a
+  languageName: node
+  linkType: hard