🚀 Feature: allowable emails for signup OR emails that aren't allowed

### 🔖 Feature description Right now a user can sign-up using any email provider they want. This includes temporary email address companies such as [disposable email providers](https://github.com/disposable-email-domains/disposable-email-domains), which enables the user to signup for countless accounts, thus potentially increasing abuse and spam on the platform. The feature request is having the ability to (1) only allow certain domains to be used as the email provider, such as hotmail, gmail, etc. AND (2) having a deny list so email providers on the list would not be able to be used to signup, such as temporary email providers. The reason I believe this should be hardcoded as a feature instead of as a hacky workaround for the developer is because of the usage people would have. Many developers would likely use such a feature, and the list would need to be regularly updated. This feature should be integrated as part of the email delivery configuration panel when setting up the STMP details. ### 🎤 Pitch Websites that use a tiered membership model, with a base free plan, may experience more fake accounts so users wouldn't have to upgrade and just keep using the free plan indefinitely with new accounts. Social platforms may experience spam/abuse with fake accounts as users try bypassing bans/limits. ### 👀 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/appwrite/blob/HEAD/CODE_OF_CONDUCT.md)