Add a new lineComments extension for CodeMirror

[VasylMarchuk]

Related to #1231

Brief

This adds a new lineComments extension for CodeMirror, for showing and adding line comments.

Details

TBD

Checklist

• I've thoroughly self-reviewed my changes
• I've added tests for my changes, unless they affect admin-only areas (or are otherwise not worth testing)
• I've verified any visual changes using Percy (add a commit with [percy] in the message to trigger)

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[github-actions]

Test Results

635 tests  +2   586 ✅ +1   8m 19s ⏱️ -41s
  1 suites ±0    49 💤 +1 
  1 files   ±0     0 ❌ ±0 

Results for commit dcbcb5f. ± Comparison against base commit 5b69f23.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 31.70732% with 56 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
app/utils/code-mirror-line-comments-gutter.ts	4.00%	24 Missing ⚠️
app/utils/code-mirror-line-comments-widget.ts	16.66%	15 Missing ⚠️
...utils/code-mirror-line-comments-expanded-plugin.ts	7.14%	13 Missing ⚠️
app/utils/code-mirror-line-comments.ts	50.00%	3 Missing ⚠️
app/utils/code-mirror-documents.ts	93.75%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[codecov]

Bundle Report

Changes will increase total bundle size by 5.84kB (0.02%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
client-array-push	38.1MB	5.84kB (0.02%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/chunk.*.js	-19 bytes	299.87kB	-0.01%
assets/chunk.*.js	5.08kB	3.0MB	0.17%
assets/chunk.*.js	772 bytes	71.25kB	1.1%

Files in assets/chunk.*.js:

• ./utils/code-mirror-line-comments.ts → Total Size: 1.31kB

• ./utils/code-mirror-line-comments-expanded-plugin.ts → Total Size: 1.98kB

• ./utils/code-mirror-documents.ts → Total Size: 13.6kB

• ./utils/code-mirror-line-comments-widget.ts → Total Size: 3.21kB

• ./utils/code-mirror-line-comments-gutter.ts → Total Size: 2.95kB

Files in assets/chunk.*.js:

• ./controllers/demo/code-mirror.ts → Total Size: 27.96kB

• ./routes/demo/code-mirror.ts → Total Size: 1.46kB

• ./templates/demo/code-mirror.hbs → Total Size: 51.55kB