🚀 Feature: Realtime authentication using API Key

### 🔖 Feature description Support to authenticate realtime (websocket) connection using an api key, passed in headers, as an aditional option to current auth using user cookies. ### 🎤 Pitch My use case would be in IOT devices which includes smart home devices, thus I can't and shouldn't use user credentials to create sessions, firstly because of rate limits and secondly from a security standpoint. ### 👀 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)