Description of the new feature / enhancement

We are thinking about phasing out the preview pane work in favor of Peek. Peek is designed in a way that allows us to iterate far faster than the File Explorer preview pane. Debugging / testing the preview pane extensions does add a lot of time. This adjustment will allow us to slim down PowerToys, iterate faster and simplify the code base

We'd love community feedback here as our plan of record will be to do the following:

1. Add GCode and STL file format to Peek for 3d file support
2. Mark File Explorer preview pane previewers as deprecated
3. Remove the preview pane previewers in the September 2023 release

I want to directly call out Thumbnail generation code will stay in PowerToys. This is only for the Preview pane

Scenario when this would be used?

Simplifying the PT code base and better user experience via PowerToys Peek

Supporting information

No response