Update README.md

Removed old entity structure.

Reworked how worlds work on the game/client side

(There is still some work to do with a few missing features)

- Worlds now don't need to be typed to be referenced
- Got rid of old stuff like instances and other things
- Worlds don't need a type paramter for the player anymore,
- ^ instead using PlayerSupplier.java
- Renamed and restructured packages and classes (BREAKING, duh)
- Better spawning and handling of entities in worlds
- Updated examples with new changes
- And probably more i forgot about...

TODO:
Better rotation
World systems
Ignore collision

Update the world structure so its alot more useable

- Abstracted away most of common logic
- Made it easier to implement your own custom worlds
- Removed the WIP instance stuff, add later.
- Added more default handling stuff

Fixed an issue with recreating new bodies in EntityBodyCreator

When creating a new body in a world, the definition would already be reset to a new one. As such, it would be a static body type and not get set to dynamic

set config option for world

Minor, ready for release.

Merge branch 'main' of https://github.com/Vrekt/LunarGdx into main

Merge branch 'main' of https://github.com/Vrekt/LunarGdx into main

Update README.md