chore: add apache license header script & CI check

[jescalada]

New PR at #1447

Fixes #1002. Inspired by #1253, credit goes to @sam-holmes2 for the original PR 🙂

Changes

• Added add-license-headers.ts script to /scripts in order to add license headers automatically
  • Executed by running npm run add-license-headers
  • Checks if the license header is already present
  • Included special handling to prevent executable files (with shebangs in first line) from breaking
  • Excludes /src/config/generated files from having the license appended, due to infinite loop with quicktype generated config
• Prepended the licenses to all TS, JS, TSX and JSX files
  • We may want to extend this to cover other file extensions
• Added check-license-headers.ts for checking headers in CI
  • Added header check to Code Cleanliness workflow (lint.yml)

[netlify]

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[jescalada]

This is where the interesting stuff happens. So you don't have to dig through the diff! 🙂

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.51%. Comparing base (2f71c12) to head (3b9d58d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1404      +/-   ##
==========================================
+ Coverage   81.25%   81.51%   +0.25%     
==========================================
  Files          65       65              
  Lines        4657     4722      +65     
  Branches      792      792              
==========================================
+ Hits         3784     3849      +65     
  Misses        858      858              
  Partials       15       15              

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[06kellyjac]

If we're avoiding the eslint plugin route rather than building our own tool/utility I'd recommend https://github.com/fsfe/reuse-tool from the
Free Software Foundation Europe

[jescalada]

@kriswest

[kriswest]

@jescalada could you rebase this and resolve conflicts? However, it might be worth getting your other two PRs set to go into the release merged first so you can get all the conflicts in one go.

[jescalada]

@06kellyjac Here's a new PR implementing this using the ESLint plugin, I wasn't aware it existed! It's quite easy to use, too. #1447

@kriswest Will close this PR if the new one is more appropriate 👍🏼