Add syntax highlighting for Crystal programming language
Description
Currently GitLab Community Edition doesn't show syntaz color for Crystal source files.
Proposal
Add syntax highlighting Crystal based on Crystal.tmLanguage
Links / references
https://github.com/crystal-lang/sublime-crystal/blob/master/Crystal.tmLanguage
Documentation blurb
Overview
Crystal language has a growing community, and their contributors (like me) also use GitLab
Use cases
Allow to highlight syntax for Crystal sources on GitLab repositories
Feature checklist
Make sure these are completed before closing the issue, with a link to the relevant commit.
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Feature assurance -
Documentation -
Added to features.yml