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/create-twenty-app/src/constants/template/package.json

@@ -16,15 +16,14 @@
     "test": "vitest run",
     "test:watch": "vitest"
   },
-  "dependencies": {
-    "twenty-client-sdk": "TO-BE-GENERATED"
-  },
+  "dependencies": {},
   "devDependencies": {
     "@types/node": "^24.7.2",
     "@types/react": "^19.0.0",
     "oxlint": "^0.16.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
+    "twenty-client-sdk": "TO-BE-GENERATED",
     "twenty-sdk": "TO-BE-GENERATED",
     "typescript": "^5.9.3",
     "vite-tsconfig-paths": "^4.2.1",