Release v0.8.0

- Replaced "bevy_spatial" with "avian2d"
- Upgraded Bevy to 0.17

The bevy_spatial crate is still stuck on Bevy 0.16 and I'd like to move
forward and start playing with some of the new UI stuff. I've replaced
it with Avian physics, although I'm only using the spatial querying
facilities not the rest of the physics engine.

Cargo.lock

@@ -175,7 +175,7 @@ dependencies = [
 
 [[package]]
 name = "another-boids-in-rust"
-version = "0.7.0"
+version = "0.8.0"
 dependencies = [
  "avian2d",
  "bevy",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "another-boids-in-rust"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2024"
 license = "AGPL-3.0-only"
 rust-version = "1.88.0"