Add commands for snapshot actions

[rgrinberg]

I prefer using commands rather than mappings so it would be nice to have these available.

[gelguy]

This is possible. Can I clarify how you would expect the syntax of the command to be?

My current idea is to select a visual area, and do

:`<,`>SnapshotCreate

the visual marks are added automatically.

I am wondering if there is a better way to do this which is less cumbersome.

[rgrinberg]

I would expect all the commands to start with Snapshot for effective tab completion. I think your idea with visual marks is fine and I don't think it's particularly cumbersome.