fix: add react-router-dom devDep and remove unused vite types

- Add react-router-dom as explicit devDependency to fix
  ServicesPage.test.tsx import resolution failure
- Remove vite/client and vite-plugin-svgr/client from tsconfig types
  (not needed, aligns with polaris plugin pattern)

Addresses QA review feedback on PR#11.

tsconfig.json

@@ -2,7 +2,7 @@
   "extends": "@kinvolk/headlamp-plugin/config/plugins-tsconfig.json",
   "compilerOptions": {
     "module": "esnext",
-    "types": ["vite/client", "vite-plugin-svgr/client", "vitest/globals", "@testing-library/jest-dom"]
+    "types": ["vitest/globals", "@testing-library/jest-dom"]
   },
   "include": ["src"]
 }