Attack hitbox insertion and activation refactor

[odecay]

Changed some logic in hitbox activation system which should ensure it is correct for multiple attacks. Added collider data directly to attacks on spawn, deduping attack code.

[odecay]

bors merge

[bors[bot]]

Build succeeded:

• Check Rust formatting
• Clippy correctness checks (wasm32-unknown-unknown, web-target)
• Clippy correctness checks (x86_64-unknown-linux-gnu, target)