Feedback wanted - [Mouse Jump] - Customisable appearance - borders, margins, colours, etc

[mikeclayton]

Summary of the Pull Request

This is a follow-up to #32838 and #27511 to introduce some style settings to control the visual appearance of the Mouse Jump preview popup - previous work in #32838 added the style rendering code but didn't surface it in the Settings UI project and left the visual appearance as it was previously, but generated using some new rendering code.

This PR adds Settings UI options - it shows a live preview in the "Appearance and behaviour" section of the Mouse Jump settings which updates dynamically as colour and layout options are edited.

It's a Work In Progress, but I'd appreciate a review of the functionality in this PR so far, primarily in terms of whether the overall approach fits in with general PowerToys design guidelines, or whether it needs a major rethink before I spend a lot of time refining it. I'm not so worried about the code right now - mostly just the visual appearance and functionality of the new Mouse Jump Settings UI options.

Here's a (slightly rubbish) capture of it in action for reference:

https://github.com/microsoft/PowerToys/assets/1193763/7fd0885e-71d9-46b1-a6ee-0b9e8c4086ed