Add Rust Templates to the SDK Generator

[eldadfux]

We need help adding Rust templates to this project to allow easy generation of Rust SDKs for Appwrite server.

A full guide on how to add new language support to the Appwrite SDK generator is located here:
https://github.com/appwrite/sdk-generator/blob/master/CONTRIBUTING.md

[eldadfux]

Update 10.03.21 - this is now a work in progress by @PineappleIOnic 🥳

[AryanParashar24]

please assign it to me, i would luv to work on it😄, if this repository is still open

[NiceSapien]

dang, a 7 years old issue still open lol

[ChiragAgg5k]

@NiceSapien just made me feel so old 😭
i was like no way its 7 years old... and then i checked the date. sure its 6 years not 7 but still :(

dont worry it will be added soon. keep giving the issue love by 👍 to get it more attention