🚀 Feature: List Cities by Country API

### 🔖 Feature description It would be good if we have List Cities by Country API ### 🎤 Pitch This allows users to select city after selecting their country. ### 👀 Have you spent some time to check if this issue has been raised before? - [X] I checked and didn't find similar issue ### 🏢 Have you read the Code of Conduct? - [X] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)