chore: add sourcemap for debug

Author: pd4d10

vite.main.config.mjs

@@ -12,8 +12,11 @@ export default defineConfig((env) => {
   const forgeEnv = env;
   const { forgeConfigSelf } = forgeEnv;
   const define = getBuildDefine(forgeEnv);
+
+  /** @type {import('vite').UserConfig} */
   const config = {
     build: {
+      sourcemap: true,
       lib: {
         entry: forgeConfigSelf.entry,
         fileName: () => "[name].js",