Add GROQ highlighting model

[rexxars]

Issue #, if available:
N/A

Description of changes:
Adds a new syntax highlighting mode for GROQ (Graph-Relational Object Queries), a query language used by the Sanity content platform, amongst others.

It is getting quite popular - it's a little hard to see the full extent of the ecosystem - but a search for the Sanity clients' .fetch() is a fairly good indicator.

The mode includes highlighting for:

• Line comments (//)
• Single and double-quoted strings with escape sequences
• Numeric literals (integer, decimal, scientific notation)
• Boolean and null literals
• Keyword operators (in, match, asc, desc)
• Built-in functions (count, select, coalesce, defined, order, etc.)
• Namespaced function calls (string::split, pt::text, etc.)
• Parameter variables ($name)
• Special variables (@, ^)
• Operators: dereference (->), spread (...), range (..), pipe (|), arrow (=>)
• Comparison and logical operators
• Brace matching, auto-outdent, and C-style code folding

Pull Request Checklist:

• By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.
• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

Open kitchen-sink @ 09e8558aae17cd8c21326df71f90796c85a52bb6

[github-actions]

One of the public type files has been updated, plase make sure there are no backwards incompatible changes done in the PR.

[github-actions]

One of the public type files has been updated, plase make sure there are no backwards incompatible changes done in the PR.

[rexxars]

I saw there was a lint issue - fixed and force-pushed, sorry about that - should have caught that earlier.

[codecov]

Codecov Report

❌ Patch coverage is 99.32432% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93.72%. Comparing base (a467a6c) to head (09e8558).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/mode/groq.js	96.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5940      +/-   ##
==========================================
- Coverage   93.72%   93.72%   -0.01%     
==========================================
  Files         634      636       +2     
  Lines      137322   137470     +148     
  Branches    14469    14464       -5     
==========================================
+ Hits       128708   128844     +136     
- Misses       8614     8626      +12     

Flag	Coverage Δ
unittests	93.72% <99.32%> (-0.01%)	⬇️

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[nightwing]

Thanks, merged.

[rexxars]

Thank you!