fix: ensure only the db file is copied to publish folder on build.

Author: 3m1n3nc3

examples/basic-app/tsdown.config.ts

@@ -1,5 +1,5 @@
-import { defineConfig } from 'tsdown';
+import { defineConfig } from 'tsdown'
 
 export default defineConfig({
     watch: ['.env', '.env.*', 'src', '../../packages'],
-});
+})