Add buffered left/right movement

[AgStarRay]

Checklist (issue will be disregarded & closed if incomplete!)

• [x] I've checked both open and recently closed issues to ensure this feature is not already requested.
• [x] I am using the newest version of TETR.IO.
• [x] I am certain this is a feature request, not a bug.
• [x] I've thought this feature through properly.

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Is your feature request related to a problem? Please describe.

This can enhance the feel of the game. Consider a T-Spin slot that's one column away from the right wall and the overhang is to the left. If you DAS to the right, MAX soft drop to the slot with the T pointing up, then button order matters. If you press Left and rotate CW in the brief window you press left (before DAS occurs), it won't move left. It only moves left if you rotate first.

Describe the solution you'd like

If it is unable to move left, add a buffered left input where it will activate the next possible frame. This is similar to the initial moves you can do at the start of a game. Remove the buffer if the button is released or the piece moves left. This will allow more leniency on how soon you need to rotate. BONUS: you can also perform soft drop tucking if implemented.

Describe alternatives you've considered

I could play slower to avoid making this mistake and point the T sideways while it goes down.

Additional context

Here's a T-Spin slot where this matters.

[o5k]

i'm not sure I understand...?

[AgStarRay]

The idea is to make inputs seem less digital and more like commands. If you press left, you should expect it to go left, but there's a brief window (the DAS timer) where Left does absolutely nothing if it fails to move left. When it fails to move left, the game should recognize that maybe the player is attempting to move into something but it's not quite at the right circumstances just yet.

Rotate → Left → Rotate = Spins in Hold Left → Rotate → DAS Charge → Rotate = Spins in Left → Rotate → Release Left too early → Rotate = Fails

In the GIF above, the board moves slightly to the left. I increased DAS delay to see if this behavior was occurring.

[o5k]

oooh, I see, so if you mix the order of "shift, rotate" it will swap them

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