feat: add index file to export app module

bun.config.ts

@@ -0,0 +1,22 @@
+import { resolvePath } from '@kevisual/use-config';
+import { execSync } from 'node:child_process';
+
+const entry = 'src/index.ts';
+const naming = 'app';
+const external: string[] = [];
+/**
+ * @type {import('bun').BuildConfig}
+ */
+await Bun.build({
+  target: 'browser',
+  format: 'esm',
+  entrypoints: [resolvePath(entry, { meta: import.meta })],
+  outdir: resolvePath('./dist', { meta: import.meta }),
+  naming: {
+    entry: `${naming}.js`,
+  },
+  external,
+});
+
+const dts = 'dts -i src/index.ts -o app.d.ts';
+execSync(dts);