workflow to add raw.githack link to pull requests

[nightwing]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Pull Request Checklist:

• 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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.16%. Comparing base (1098e53) to head (269b210).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5774   +/-   ##
=======================================
  Coverage   87.16%   87.16%           
=======================================
  Files         603      603           
  Lines       44214    44214           
  Branches     7248     7248           
=======================================
  Hits        38539    38539           
  Misses       5675     5675           

Flag	Coverage Δ
unittests	87.16% <ø> (ø)

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