🚀 Feature: Rust support

### 🔖 Feature description

Support for [Rust](https://www.rust-lang.org/) runtime for Cloud Functions.

### 🎤 Pitch

Rust is totally trending and the most loved language in the developer's community.
It would be nice to have an option to write functions with the use of it.

I would love to work on this by myself!

### 👀 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)

The issue names no files, tests, or entry points. Start by locating the existing runtime definitions and compare how supported languages are represented; done means Rust is supported for Cloud Functions, with any relevant repository checks passing.

Written by the indexing model from the issue text.