📚 Documentation: Add inline docs to SDKs

[stnguyen90]

💭 Description

Inline docs are helpful as they can provide help in the editor when a developer hovers over a method.

Docs can be copied from https://github.com/appwrite/sdk-generator/pull/671

• [ ] android
• [x] cli - not needed
• [x] dart - completed as part of https://github.com/appwrite/sdk-generator/pull/671
• [ ] deno
• [ ] dotnet
• [x] https://github.com/appwrite/sdk-for-flutter/issues/152 - completed as part of https://github.com/appwrite/sdk-generator/pull/671
• [x] go - not ready
• [x] graphql/docs - not needed
• [ ] kotlin
• [ ] node
• [ ] php
• [ ] python
• [x] rest/docs - not needed
• [ ] ruby
• [ ] swift
• [ ] https://github.com/appwrite/sdk-generator/pull/721 (@Im-Madhur-Gupta)

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• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct