New "find my mouse" effect "Spotlight"
Copied from Windows PowerToys. I feel it's easier to find the cursor with that, than with "Shake Cursor" and "Track Mouse" we currently have.
How it looks: https://learn.microsoft.com/en-us/windows/powertoys/mouse-utilities#find-my-mouse
I'll start by copying code from "Shake Cursor". But in the end, what's the proper way?
- It should be added as a visual effect option in "Shake Cursor".
- It and "Shake Cursor" (perhaps also "Track Mouse") should share a base class.