Fix CI on main: RouteMap typecheck + metro.config lint

- RouteMap.tsx referenced undefined MapLibreRN namespace, causing
  typecheck to fail on main and in every downstream PR
- metro.config.js is CommonJS, exclude from ESLint flat config

Changes that were pushed directly to main earlier bypassed CI and
broke both typecheck and lint.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

eslint.config.js

@@ -3,7 +3,7 @@ import tseslint from "typescript-eslint";
 import prettier from "eslint-config-prettier";
 
 export default tseslint.config(
-  { ignores: ["**/build/", "**/dist/", "**/.react-router/", "**/.expo/", "**/node_modules/"] },
+  { ignores: ["**/build/", "**/dist/", "**/.react-router/", "**/.expo/", "**/node_modules/", "**/metro.config.js"] },
   js.configs.recommended,
   ...tseslint.configs.recommended,
   {