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

• Move inner state transition to plugin (automatically added in build if needed)
• Remove inner OnExit schedules
• Possible to get rid of State generics? (doesn't look like it, at least not with methods directly on the app 😞 )
• Remove special path handling for mapped folders Full example crashes at typed + mapped values #104 (done on main)
• Support using next state handling from iyes_progress in any situation ( resolves Ensure iyes_progress waits until the loading state ran #107)
• Wait for Bevy 0.10 release
  • Wait for bevy_common_assets release
  • Wait for iyes_progress release

[deifactor]

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