feat: scan kits from a folder

[std-microblock]

The following changes are proposed:

• A button to select a folder to scan kits in the kits selection menu.

The purpose of this change

Make the creation of kits easier.

[gcampbell-msft]

@std-microblock Thanks for your patience, we hope to assess this as soon as we can, but it may not be until after the holidays. Thank you for understanding.

[sinemakinci1]

@std-microblock thank you so much for your contribution, we greatly appreciate it and your support! As a quick update, we plan to take this PR into our extension soon.

As a side note, we plan to prioritize enhancements to CMake presets support moving forward (see issue: #4117). If there is a reason you prefer kits, we would love to know more in the issue I linked.

[gcampbell-msft]

A couple of things that would improve this PR have been commented / requested. Otherwise, I think the changes look reasonable, please ping me when you've updated the PR based on my comments!

[std-microblock]

I'll look into the changes when I have spare time.

[gcampbell-msft]

I updated the code to share the logic, added context in the strings letting users know that it will be a recursive search, and I also added a progress notification for the accumulation of the folders to scan, since it could be a long operation someone selected a folder with lots of content. If you cancel, it will move forward with whatever was already scanned.

[Yingzi1234]

Verified this issue on cmake tools v1.20.50(pre-release), issue was fixed.