Basic attack chaining

[odecay]

Only works for a specific sequence of attacks for Dev fighter currently. Hitting attack during an active "chain" attack will cancel the recovery frames (and a few startup frames on the followup) and move to the next attack.

closes #179 but requires followup work.

Followup should generalize the recovery canceling and attack chain sequence to work for any valid predefined sequence of available attacks on a fighter.

[odecay]

bors merge

[bors[bot]]

Already running a review

[odecay]

bors cancel

[bors[bot]]

Canceled.

[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)