Add styles to x-scroll in code block

[HelenVirtanen]

Description

Add custom horizontal scrollbar styling

[yc-ui-bot]

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
189	166	3	20	0	0	2m 16s

Failed Tests

Failed Tests ❌	Fail Message
❌ code block visual regression after toggle text wrapping	Error: expect(Buffer).toMatchSnapshot(expected) failed 1246 pixels (ratio 0.03 of all image pixels) are different. Snapshot: long-content-code-block-text-wrapping.png
❌ code block visual regression after toggle text wrapping	Error: expect(Buffer).toMatchSnapshot(expected) failed 911 pixels (ratio 0.02 of all image pixels) are different. Snapshot: long-content-code-block-text-wrapping.png
❌ code block visual regression after toggle text wrapping	Error: expect(Buffer).toMatchSnapshot(expected) failed 3438 pixels (ratio 0.02 of all image pixels) are different. Snapshot: long-content-code-block-text-wrapping.png

Github Test Reporter by CTRF 💚

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[yc-ui-bot]

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
189	169	0	20	0	0	2m 17s

_{🎉 No failed tests in this run.}

Github Test Reporter by CTRF 💚