Merge pull request defstudio#616 from YSRoot/implement-forum

Implement forum methods

refactor

fix types

docs optimization

fix docs

add reference to file size limits for download

Merge pull request defstudio#605 from ah-rahimi/WriteAccessAllowed

[feat] write access allowed field

Merge pull request defstudio#598 from ivankuraev/main

Implements sendSticker method

Merge pull request defstudio#600 from defstudio/defstudio#386-impleme…

…nted-thread-method

defstudio#386-implemented-thread-method

Merge pull request defstudio#599 from defstudio/defstudio#498-impleme…

…nt-sendMediaGroup-method

defstudio#498 implement sendMediaGroup method