Link Tablet eraser to Eraser tool

Hello!

Running Windows 11 with a Wacom Intuos tablet here.

My tablet pen has an eraser nib on the backside. It would be a really great Quality of Life improvement to be able to just flip my pen around and erase without having to go selecting the tool. With the current github version, both sides of my pen behave the same way, depending on what tool is selected.

No file, test, or entry point is named in the issue. Begin by locating the existing tablet input handling and determine how the eraser nib is distinguished from the pen tip on Windows and Wacom devices. Done means flipping the pen selects the Eraser tool while the normal tip retains its current behavior, with existing input behavior still working.

Written by the indexing model from the issue text.