Move twenty-client-sdk to dev dep (#21611)

# Introduction
The `twenty-client-sdk` is always provided and injected at runtime by
the twenty-server instance
Which mean that even if in your app locally you're using
twenty-client-sdk `1.0` installing this app on twenty instance `2.0`
will result in injecting another `twenty-client-sdk`

That's the expected behavior and tradeof

The twenty-app devdep should only be used to guide local devxp following
typesafety and so on

A user can still locally generated its own twenty-client-sdk and publish
it if necessary

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packages/twenty-apps/examples/hello-world/package.json

@@ -15,15 +15,14 @@
     "test": "vitest run",
     "test:watch": "vitest"
   },
-  "dependencies": {
-    "twenty-client-sdk": "2.13.0",
-    "twenty-sdk": "2.13.0"
-  },
+  "dependencies": {},
   "devDependencies": {
     "@types/node": "^24.7.2",
     "@types/react": "^18.2.0",
     "oxlint": "^0.16.0",
     "react": "^18.2.0",
+    "twenty-client-sdk": "2.13.0",
+    "twenty-sdk": "2.13.0",
     "typescript": "^5.9.3",
     "vite-tsconfig-paths": "^4.2.1",
     "vitest": "^4.0.0"

packages/twenty-apps/examples/postcard/package.json

@@ -20,10 +20,7 @@
     "test:e2e": "playwright test",
     "test:e2e:ui": "playwright test --ui"
   },
-  "dependencies": {
-    "twenty-client-sdk": "2.13.0",
-    "twenty-sdk": "2.13.0"
-  },
+  "dependencies": {},
   "devDependencies": {
     "@playwright/test": "^1.60.0",
     "@types/node": "^24.7.2",
@@ -32,6 +29,8 @@
     "playwright": "^1.60.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
+    "twenty-client-sdk": "2.13.0",
+    "twenty-sdk": "2.13.0",
     "typescript": "^5.9.3",
     "vite-tsconfig-paths": "^4.2.1",
     "vitest": "^4.0.0"