Pyflyt

Introducing the `PyFlyt/QuadX-Pole-Balance-v2` Environment!

Inspired by [this dated but still cool video](https://www.youtube.com/watch?v=w2itwFJCgFQ&themeRefresh=1), the QuadX Pole Balance environment serves as a starting point for more complex environments to come. Some of which include Pole Waypoints and Pole Flipping.


Minor QOL Improvement: updates typehints and docstrings.

Fixed 46

What's Changed
* The default drones now have a `camera_fps` parameter. The idea was introduced by ch-MEIJIE in https://github.com/jjshoots/PyFlyt/pull/43
* `update_control` and `update_camera` now has a `physics_step` argument at the API level. This is to facilitate the new `camera_fps` change and to have cleaner code across the codebase.
* As a result of the above change, the environment logic has now been slightly modified since we can measure state before a simulation step. Therefore, all environments have been version bumped.

New Contributors
* ch-MEIJIE made their first contribution in https://github.com/jjshoots/PyFlyt/pull/43

**Full Changelog**: https://github.com/jjshoots/PyFlyt/compare/0.21.0...0.22.0

What's Changed
* Make rendering GUI optional when render_mode is set to rgb_array by peterghaddad in https://github.com/jjshoots/PyFlyt/pull/36

- Fixes render RTF bug in https://github.com/jjshoots/PyFlyt/commit/3406dbe651e2141ea62b9052b826a27f76fe1cab , reported in #32 .
- Fixes rotational drag for quadx model in 34 .