Zig gamedev project v0.2.0 – physics support

I continue to build game development ecosystem for Zig programming language.

Zig gamedev project home: https://github.com/michal-z/zig-gamedev

New physics demo: https://github.com/michal-z/zig-gamedev/tree/main/samples/bu...

Prebuilt binaries for all demos: https://github.com/michal-z/zig-gamedev/releases/download/v0...