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)

[coderabbitai]

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[github-actions]

Test Results

  1 files  ±0    1 suites  ±0   6m 24s ⏱️ - 1m 50s
609 tests +2  566 ✅ ±0  42 💤 +1  0 ❌ ±0  1 🔥 +1 
624 runs  +2  580 ✅  - 1  42 💤 +1  1 ❌ +1  1 🔥 +1 

For more details on these errors, see this check.

Results for commit aa4bf41. ± Comparison against base commit de0a48c.

♻️ This comment has been updated with latest results.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
567	1	566	42

View the full list of 1 ❄️ flaky tests

Chrome 132.0 Integration | Component | code-mirror > Options > filename: it doesn't break the editor when passed

Flake rate in main: 64.00% (Passed 18 times, Failed 32 times)

Stack Traces | 5.08s run time

Test took longer than 5000ms; test timed out.

To view more test analytics, go to the Test Analytics Dashboard
_{📋 Got 3 mins? Take this short survey to help us improve Test Analytics.}

[codecov]

Bundle Report

Changes will increase total bundle size by 8.25kB (0.02%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
client-array-push	36.11MB	8.25kB (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	8 bytes	403.1kB	0.0%
assets/chunk.*.js	-1 bytes	234.06kB	-0.0%
assets/chunk.*.js	6.84kB	2.44MB	0.28%
assets/chunk.*.js	232 bytes	299.45kB	0.08%
assets/chunk.*.js	13 bytes	160.43kB	0.01%
assets/chunk.*.js	5 bytes	107.91kB	0.0%
assets/chunk.*.js	85 bytes	30.8kB	0.28%
assets/chunk.*.js	1 bytes	22.89kB	0.0%
assets/chunk.*.js	1.06kB	63.51kB	1.69%
assets/chunk.*.js	-1 bytes	53.02kB	-0.0%
assets/chunk.*.js	1 bytes	12.04kB	0.01%

Files in assets/chunk.*.js:

• ./utils/code-mirror-line-comments-widget.ts → Total Size: 3.16kB

• ./utils/code-mirror-line-comments.ts → Total Size: 2.29kB

• ./utils/code-mirror-line-comments-expanded-plugin.ts → Total Size: 1.68kB

• ./utils/code-mirror-line-comments-gutter.ts → Total Size: 3.23kB

Files in assets/chunk.*.js:

• ./controllers/demo/code-mirror.ts → Total Size: 27.87kB

• ./templates/demo/code-mirror.hbs → Total Size: 48.7kB

• ./routes/demo/code-mirror.ts → Total Size: 1.4kB