Add Yuescript

[haroon26]

Description

I have added a new language called 'yuescript'. This has been added from issue #6087 request.

Checklist:

• I am adding a new language.
  • The extension of the new language is used in hundreds of repositories on GitHub.com.
    • Search results for each extension:
      • https://github.com/search?utf8=%E2%9C%93&type=Code&ref=searchresults&q=extension%3Ayue+local+NOT+nothack
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • Yuescript
    • Sample license(s): MIT
  • I have included a syntax highlighting grammar: URL to grammar repo
  • I have updated the heuristics to distinguish my language from others using the same extension.

Closes #6087

[haroon26]

I will commit changes tonight to pass all the checks

[lildude]

Popularity isn't high enough for inclusion yet, but that doesn't mean you can't address the inline comment.

It's probably a good idea to add a colour too. Maybe #b7ae8f as used on the Yuescript website?

[lildude]

Closing as the requested changes have not been made in well over a year since being requested. Please open a new PR when you have the time to make the requested changes.

[lildude]

Whoops. A little too eager on this one.

Requested changed made. Pending popularity.