Add react-router-devtools to project setup

Integrates react-router-devtools to enhance development
debugging and inspection of React Router states.

Improves development efficiency by providing tools
to visually analyze navigation changes and application state.

Author: MichielOlijslagers

TODO.md

@@ -22,7 +22,7 @@
 - Usability
   - [ ] Breadcrumbs
 - Dev experience
-  - [ ] Dev tools
+  - [x] Dev tools
     - https://react-router-devtools.forge42.dev/
   - [x] Env variables evaluation
     - https://dane.computer/blogs/type-safe-environment-variables-in-remix

package.json

@@ -56,6 +56,7 @@
     "@types/react": "^19.1.6",
     "@types/react-dom": "^19.1.5",
     "prettier": "^3.5.3",
+    "react-router-devtools": "^5.0.6",
     "tailwindcss": "^4.1.8",
     "tw-animate-css": "^1.3.3",
     "typescript": "^5.8.3",