Dynamic Player Animations

Special thanks to Rega for run and idle animations

- New base idle animation (adaptaed from work by rega)
- New run animation (made by rega)
- Reworked some cape physics code
- Improved stairs interactions
- Tuned walking stride and step timing
- Riding animations: Amazing integration with my detailed worlds horses
- Improved wall contact poses
- Cleaned up some code and optimisations
- Added credits file