move to vitest (#18)

* feat: move to vitest

* fix: lock file

* fix: tests running sequentially on same port

* fix lock file

---------

Co-authored-by: Paul Carleton <paulcarletonjr@gmail.com>

vitest.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['**/*.test.ts'],
+    exclude: ['node_modules', 'dist'],
+    // Run test files sequentially to avoid port conflicts
+    fileParallelism: false,
+    // Increase timeout for server tests in CI
+    testTimeout: 15000,
+    hookTimeout: 30000
+  }
+});