Visual mode: paste over selection (p)

[adriangalilea]

Currently p doesn't act on a visual selection. Proposal: paste over the selected range.

Open design questions:

• Clipboard bigger than the selection: clip or spill?
• Clipboard smaller: leave rest untouched, or tile to fill (Excel tiles; vim/helix replace regardless of size)?
• Single cell pasted into a multi-cell selection: fill all?

Happy to implement once a direction feels right.