Fix enemy hitbox priorities

[Kuma-Boo]

Description of changes

Actual changes:

• Enemy entities use a new "deferred" connect mode to ensure their signals are always processed after the player.
• While fixing the parakoopa's hitboxes, I also refactored its script a bit.

Some extra things to note:

• While spinning enemies is more consistent, the timing feels way too generous now. Will open a proposal to fix this later.
• The transitions between parakoopas, koopas and shells are still super jank. Will open a proposal to clean them up later.

Issue(s)

Closes #128 Fixes the first reproduction scenario of #118

[Kuma-Boo]

After making some comparisons with the original flash version, The Flash version has an absurdly large hitbox, but seems to only be active for about 12 frames. Redux's spin in comparison has a super long active window of 30 frames.

Not really a big deal as we can always nerf it later and it's pretty unrelated to this pr, but I just thought I should document it.

[Koopa1018]

Hmm. That duration change is a good thing to note.

[Koopa1018]

(come to think of it I suppose I was talking about the giant hitbox before, not the timing...that probably caused some confusion 🤦)

[Koopa1018]

(whoa. just checked the timing out and dang you weren't kidding--that window is BIG.)