feat: feature refactor

feat: avian!

feat: bevy 0.17

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

unified

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

fix: planet indicator direction

chore: code cleanup

chore(part): part fix #1

fix: parts

chore: newtype linearsplines for particle system

feat: mod spawning

feat: bloom!

feat: indicators