Add a quick check for MST Store Python install

[arogl]

Description

Quick fix for #5467.

Checks if the path for python is under the windows store folder then error and point the user to the beets documentation.

Happy for feedback to improve, but thought it best to exit as early as possible.

To Do

• [x] Documentation.
• [x] Changelog.
• [x] Tests.

[github-actions[bot]]

Thank you for the PR! The changelog has not been updated, so here is a friendly reminder to check if you need to add an entry.

[snejus]

Apologies for not addressing this earlier - all looks good, just needs a rebase on latest master.

[arogl]

Apologies for not addressing this earlier - all looks good, just needs a rebase on latest master.

I believe I have managed a rebase 😃