add bun build file

build.js

@@ -0,0 +1,16 @@
+const res = await Bun.build({
+  entrypoints: ['./index.js'],
+  outdir: './dist',
+  sourcemap: "inline",
+  minify: true,
+})
+
+if (!res.success) {
+  console.error('❌ Build failed! ❌')
+  for (const msg of res.logs) {
+    console.error(msg)
+  }
+  process.exit(1)
+}
+
+console.log('✨ Build successful! ✨')