Map2 python rework preview

[shiro]

Map2 will soon become a python library and drop the custom scripting language.

The preview branch can be found here.
The API likely will change, so please keep that in mind. Any feedback is appreciated, I hope that the transition will be smooth and doesn't bother people too much.

The library itself is still written in rust and the core itself is mostly unchanged code, the only thing that changed is the scripting language. Python is around 100% faster and provides a standard library along with lots of other features, so writing a custom language is not feasible in the long run.

The legacy version (currently still master) will remain in a separate repo located here.
Don't expect any new features on the legacy version, all efforts will be focused on the new python based release.