update spacetime for new client

extend module system in client

Merge branch 'master' of https://gitlab.com/starkingdoms.tk/starkingdoms.tk

fix spacetime builds in nested subdirectories pt2

fix spacetime builds in nested subdirectories

rename st to spacetime

replace justfile with spacetime

[wip] spacetime build - build client with both texture loaders

[wip] spacetime build beginnings