feat(themes): added witchthorne theme (NotMageLock)

[NotMageLock]

added new theme, witchthorne

[github-actions]

Hey there and thank you for opening this pull request! 👋🏼

We require pull request titles to follow the Conventional Commits specification and also include the author name at the end inside parenthesis. It looks like your proposed title needs to be adjusted.

Details:

Title "feat(themes): added witchthorne theme (NotMageLock)"
didn't match the configured pattern. Please ensure that the title
contains your name so that you can be credited in our changelog.
A correct version would look something like: 

feat: add new feature (@github-username)
impr(quotes): add english quotes (@github-username)
fix: resolve bug (@github-username)

A correct version would look something like:

feat: add new feature (@github-username)
impr(quotes): add english quotes (@github-username)
fix: resolve bug (@github-username)

[github-actions]

Continuous integration check(s) failed. Please review the failing check's logs and make the necessary changes.

[fehmer]

Very similar to joker