chore(dependencies): add @testing-library/jest-dom to package.json and pnpm-lock.yaml

- Included @testing-library/jest-dom version 6.9.1 to enhance testing capabilities.
- Updated pnpm-lock.yaml to reflect the new dependency and its resolution details.
- Removed unused version click handling from Sidebar component to streamline code.

package.json

@@ -67,6 +67,7 @@
     "@radix-ui/react-tabs": "^1.1.2",
     "@radix-ui/react-toast": "^1.2.4",
     "@radix-ui/react-tooltip": "^1.1.6",
+    "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.1.0",
     "@types/node": "^22.10.5",
     "@types/react": "^19.0.2",