Add Clue language

[Markos-Th09]

Description

This PR adds the clue language to linguist.
Closes #6305

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?q=path%3A**%2F%3F*.clue&type=code
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • https://github.com/ClueLang/Clue
      • https://github.com/Maiori44/msgpack-clue
      • https://github.com/Maiori44/ip-please
    • Sample license(s): MIT, UNLICENSE
  • I have included a syntax highlighting grammar: https://github.com/ClueLang/Clue-For-VSCode
  • I have added a color
    • Hex value: #0009b5
    • Rationale: Used as the main color in the language logo

[Alhadis]

@Markos-Th09 Regarding your question about "unacceptable samples", the following files appear to be fixtures for testing syntax-parsing, or an example code-snippet taken from a tutorial:

• mixed.clue
• macro.clue
• fizzbuzz.clue
• nested_ifs.clue

The following samples are good examples of realistic, practical uses for Clue (and ideally what you should be aiming for when selecting samples):

• msgpack.clue
• player.clue
• terminal.clue

[Markos-Th09]

@Markos-Th09 Regarding your question about "unacceptable samples", the following files appear to be fixtures for testing syntax-parsing, or an example code-snippet taken from a tutorial:

• mixed.clue
• macro.clue
• fizzbuzz.clue
• nested_ifs.clue

The following samples are good examples of realistic, practical uses for Clue (and ideally what you should be aiming for when selecting samples):

• msgpack.clue
• player.clue
• terminal.clue

Thanks I think we have some more of these.

[Alhadis]

These samples are much better, thanks!

[lildude]

We can't accept this grammar without a license. Please find another grammar or license your grammar with one of these licenses and add the cached license file to this PR (run bundle exec licensed cache -c vendor/licenses/config.yml once you've added a license file and pulled the latest SHA into this PR).

[Markos-Th09]

We can't accept this grammar without a license. Please find another grammar or license your grammar with one of these licenses and add the cached license file to this PR (run bundle exec licensed cache -c vendor/licenses/config.yml once you've added a license file and pulled the latest SHA into this PR).

The grammar is licensed under MIT.

[lildude]

Usage is really low for inclusion right now too.

[lildude]

The grammar is licensed under MIT.

Not according to the repo:

We need a license file.

[Markos-Th09]

The grammar is licensed under MIT.

Not according to the repo:

We need a license file.

It is intended to be licensed under MIT. I don't know what happened but I will add the license as soon as I can.

[Markos-Th09]

Resolved