* opti: fix perf regressions in new armature lock system
... by avoiding reinitializing everything whenever any target bone moves.
* chore: fixing unity 2019 issues
* opti(armature-lock): parallelize burst jobs for armature lock processing
* feat: continue armature tracking when the MAMA GameObject is disabled
Closes: #500
* feat: add global toggle for armature locking
Closes: #484
* chore: rearrange package structure to have the package at the root
* ci: update CI workflows
* ci: fixing workflow bugs
* ci: recurse building .zip package
* ci: more fixes
* ci: add back in the nadena.dev VPM repo
* ci: fix tests
