Player: Implement PlayerAnimFrameCtrl

[MonsterDruide1]

This class is used to keep track of the current frame within an animation. It can handle looping animations (mIsActionRepeat) and changing the framerate of animations (mRate), resulting in faster or slower playback.

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This change is 

[tetraxile]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @MonsterDruide1)

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src/Player/PlayerAnimFrameCtrl.h line 31 at r1 (raw file):

    f32 mRate = 1.0f;
    bool mIsSkipUpdate = false;
};

add static_assert for size of struct here

[MonsterDruide1]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @tetraxile)

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src/Player/PlayerAnimFrameCtrl.h line 31 at r1 (raw file):

Previously, tetraxile wrote…

add static_assert for size of struct here

Done.