[Feature]: Keyboard controls for Block placement

[adamfratino]

Feature description

At the moment you can drag a block to a different area of a tab to position it. I'd like to be able to do something similar via keyboard controls.

Implementation Suggestion

I can think of three-ish options:

1. Holding a modifier key(s) (similar to block focus via ctrl+shift) and pressing arrow keys to iterate over the same draggable drop zones, and place the block when the modifier key(s) are released.
2. Holding a modifier key(s) and pressing arrow keys to actively move the block to different drop zones (bypass the selection/drop UI and just do it).
3. Modifier keys similar to an app like [Rectangle(https://rectangleapp.com/) that move the focused block to a position within the tab, agnostic of the other blocks (i.e. modifier + right arrow would move the block to the right-most area of the tab, regardless of what's currently there)

1 or 2 are my preference, as they provide the highest level of control.

Anything else?

My screen recording is failing when I try to upload, here's a video on Streamable instead: https://streamable.com/7xls11 (video dies in two days because I don't want to sign up. Happy to re-up as needed, just ping me).