bevy 0.7 release

What's Changed

• simple documentation by @MrPicklePinosaur in #1
• sfx system by @MrPicklePinosaur in #2
• camera utils by @MrPicklePinosaur in #3
• sync health bar and health componet by @MrPicklePinosaur in #5

New Contributors

• @MrPicklePinosaur made their first contribution in #1

Full Changelog: https://github.com/HalfPixelStudios/bevy_bobs/commits/v0.1