feat: auth/gameToken 모듈로의 경로 변경 및 tsdown 설정 추가

packages/common/tsdown.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+    entry: {
+        index: 'src/index.ts',
+        'auth/gameToken': 'src/auth/gameToken.ts',
+    },
+    format: 'es',
+    outDir: 'dist',
+    dts: {
+        build: true,
+    },
+    sourcemap: true,
+    target: 'node22',
+    platform: 'node',
+    fixedExtension: false,
+    hash: false,
+});