build: migrate to pnpm and add vitest testing infrastructure

- Replace Yarn with pnpm as package manager
- Add Vitest with React Testing Library and happy-dom
- Configure test setup and add test scripts (test, test:ui, test:run)
- Add IPCard component and update lookup components
- Remove unused react-ogp dependency
- Add type-check script

vitest.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitest/config';
+import path from 'path';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'happy-dom',
+    setupFiles: ['./src/test/setup.ts'],
+  },
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+});