Makes polymorph use an action bar

[Arthur-Holiday]

[BALANCE]

About the PR

Makes polymorph use an action bar like the cluwne spell, it has no icon yet and I hope to make one in the future if no one else makes one

Why's this needed?

Easier to notice and counteract + it means we can do the checks we used to only do at the end of the spell during the spell's casting time.

Changelog

(u)Arthur Holiday
(+)Polymorph now has an action bar.

[Crackaduck]

while this is a start, id personally rather see polymorph just be reworked in general, and make the change temporary, making it a spell where you can weaken an opponent, and if they die in polymorphed form, or survive long enough, they become human again.

[github-actions]

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