Add WGSL support

[joaogabrielzo]

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*.wgsl&type=code
  • I have included a real-world usage sample for all extensions added in this PR:
    • Sample source(s):
      • Bevy's Example
    • Sample license(s):
      • MIT
  • I have included a syntax highlighting grammar: wgsl-grammar
  • I have added a color
    • Hex value: #1a5e9a
    • Rationale: Blue is a present color in the WebGPU logo. This shade is used in the official WGSL doc.
  • I have updated the heuristics to distinguish my language from others using the same extension.

[lildude]

The script/add-grammar script should have cached a copy of the repo's license to a yaml file. We need this file as part of this PR.

If you can't find it, possibly because of an issue being hit, you can manually get the file by running: bundle exec licensed cache -c vendor/licenses/config.yml.

As an aside, you don't need to maintain a repo just for the grammar. We can use the wgsl-analyzer repo directly.

[joaogabrielzo]

I'm running into troubles trying to install the charlock_holmes gem and that seems to be the reason why the script won't fully work. For the same reason I can't run the command you sent.

[lildude]

charlock_holmes isn't needed for that command so you should find running gem install licensed and then licensed cache -c vendor/licenses/config.yml will do the trick too.

[lildude]

You need to correct the ordering in the three locations identified in the test failures. For sorting the submodule, you can use script/sort-submodules (it's run as part of the script/add-grammar script).

[lildude]

LGTM