Is your feature request related to a problem? Please describe.
Some terminals offer the ability to report pixel coordinates of mouse events along with the character coordinate. I want to make a UI based on the kitty image protocol (also blocked by #834) where pixel coordinates of events are important.

Describe the solution you'd like
I would like crossterm to provide access to these modes and add the pixel coordinates to MouseEvent.

Describe alternatives you've considered if any

Additional context
I found this website describing the SGR-Pixels (1016) mode.