feat: change to use commonjs output

packages/models/src/index.js

@@ -0,0 +1,15 @@
+import mongoose from 'mongoose'
+
+export { default as User } from './user.js'
+export { default as Quest } from './quest.js'
+export { default as Session } from './session.js'
+export { default as Command } from './command.js'
+export { default as UserProfile } from './userProfile.js'
+
+export default async function connectDB(uri) {
+  const db = await mongoose.connect(uri, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+  })
+  return db.connection.getClient()
+}