feat: initialize TypeScript configuration and Vitest setup

- Add pnpm workspace configuration to specify built dependencies.
- Create tsconfig.json for TypeScript compiler options and module resolution.
- Add tsconfig.build.json for build-specific TypeScript settings.
- Set up Vitest configuration with path aliasing for testing.

vitest.config.ts

@@ -0,0 +1,13 @@
+import path from 'node:path'
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './src'),
+    },
+  },
+  test: {
+    environment: 'node',
+  },
+})