Reader Customization

[dvdchr]

Continuing from #22851, this task tracks the remaining issues with Reader customization that should be resolved before enabling the feature flag.

• [x] Properly apply display settings on:
  • [x] #22929
  • [x] #22938
• [x] #22939
• [x] #22948
• [x] #22967
• [x] #22985
• [x] #22995
• [x] #23001
• [x] #22999
• [ ] Create a custom slider component to match the design (maybe...)

[dangermattic]

Thanks for reporting! 👍

[dvdchr]

This has been shipped for 24.7, publicly available on Apr. 29, 2024.