refactor: have stage-ui dedicated (#11)

* tmp commit
* now it works
* fix: various of type and import issues
* refactor: move test
* refactor: rename with stage- prefix
* refactor: all monorepo packages
* refactor: fix all build
* refactor: fix missing dep
* fix: remove unnecessary deps
* fix: netlify publish
* fix: hf space deploy

---------

Co-authored-by: LemonNeko <chheese048@gmail.com>

scripts/fs.ts

@@ -0,0 +1,25 @@
+import { stat } from 'node:fs/promises'
+
+export async function exists(path: string) {
+  try {
+    await stat(path)
+    return true
+  }
+  catch (error) {
+    if (isENOENTError(error))
+      return false
+
+    throw error
+  }
+}
+
+export function isENOENTError(error: unknown): boolean {
+  if (!(error instanceof Error))
+    return false
+  if (!('code' in error))
+    return false
+  if (error.code !== 'ENOENT')
+    return false
+
+  return true
+}