fix: add @types/react and @types/react-dom to resolve TypeScript errors

PR #37 removed vite/client from tsconfig types which broke React.Component
typing since vite/client provided React type definitions. Adding explicit
@types/react and @types/react-dom devDependencies is the correct fix as the
plugin doesn't directly depend on vite.

Fixes: TypeScript check failing on main (5 errors in PolarisErrorBoundary)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

package.json

@@ -37,6 +37,8 @@
     "@testing-library/jest-dom": "^6.4.8",
     "@testing-library/react": "^16.0.0",
     "@testing-library/user-event": "^14.5.2",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
     "jsdom": "^24.0.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",