Update to Bevy 0.10

[NiklasEi]

Remove loopless support and switch to new stageless scheduler. The integration tests will be green again when bevyengine/bevy#7825 is merged

• [x] Move inner state transition to plugin (automatically added in build if needed)
• [x] Remove inner OnExit schedules
• [x] Possible to get rid of State generics? (doesn't look like it, at least not with methods directly on the app :disappointed: )
• [x] ~Remove special path handling for mapped folders #104~ (done on main)
• [x] Support using next state handling from iyes_progress in any situation ( resolves #107)
• [x] Wait for Bevy 0.10 release
  • [x] Wait for bevy_common_assets release
  • [x] Wait for iyes_progress release

[deifactor]

Thanks a ton, both for this update and for the crate in general :)