chore: bump dependencies, added script to download live2d sdk

scripts/fs.ts

@@ -0,0 +1,18 @@
+import { stat } from 'node:fs/promises'
+
+export async function exists(path: string) {
+  try {
+    await stat(path)
+    return true
+  }
+  catch (error) {
+    if (!(error instanceof Error))
+      throw error
+    if (!('code' in error))
+      throw error
+    if (error.code !== 'ENOENT')
+      throw error
+
+    return false
+  }
+}