feat: initial orbit velocity

scaled down planet masses while keeping gravity the same

fix: planets rely purely on springs now, so it should be possible to push them around now

feat: avian f64, which means orbit springs work now

fix: parts have initial velocity matching parent planet, and orbit indicator uses relative velocity

feat: orbits

feat: added some parts, and all planets have a resource

feat: crafting buttons cause parts to spawn

feat: drill does drill, and there's a resource display

feat: drill button below close button + planet resources

fix: planet sizes doubled to reduce gravity falloff

feat: add orbital info to config

Merge branch 'core/rewrite-it-all-again-lmao' into 'master'

unified

See merge request starkingdoms.tk/starkingdoms.tk!5

planets.pc.toml: mercury sprite name update

chore: fix gravity

planet positions and gravity changed

merge zoom

feat: bloom!

feat: indicators

planets and hearty