Aiomarzban

New features
- Single session may be used for requests (not tested)
- get_or_create_user method improved
- New exception for code 404

Fixes
- Few prints removed from code

Changes
- Readme update
- Token params added
- Fully async token management
- Timeout for requests
- Retries for requests
- Params to Pydantic classes
- Str added to enums
- Requests library removed from dependencies

Fixes
- set_owner method fixed (+ test)
- Custom timeout for get_users method

Required changes to code that uses aiomarzban
- All enums using changed from Enum.something.value to Enum.something
- Method renamed: get_node_usage to get_nodes_usage

First version of aiomarzban

- Fully async library
- Automatic under-the-hood access token management
- All functions implemented as native class methods
- All panel methods
- Pytest coverage 80%+
- Default values can be provided for user creation
- Simplified user creation through method parameters
- Automatic conversion of gigabytes to bytes
- Custom methods for tailored functionality