Changes to pass ordering caused Merge Armature to destroy menus before being
processed by Menu Installer; fix this by hoisting menu generation to occur within
the animation services context, before Merge Armature runs. This is safe because
the menu installer pass does not interact with the avatar's animator controllers
directly.
* 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