Hitstop

[Zac8668]

Adds a way to set the time of the hit stop (time that the fighter/player is paralyzed on hit). Closes #180

[odecay]

bors merge

[bors[bot]]

Build failed:

• Clippy correctness checks (wasm32-unknown-unknown, web-target)

[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)