[Research] OUI Compliance audit of src/core/public/rendering

[BSFishy]

Tracking issue for OUI compliance audit of the src/core/public/rendering folder.

Follow the steps in #3945 to complete the audit, then open another issue with findings. Once the work of performing the audit is done, this issue can be closed.

Note that this is a core service, which may be involved with the implementation and inclusion of OUI styles and themes. Since this is a core service, the conclusion of this audit might actually not involve any additional work.

Related files

size (bytes)	file	notes
749	src/core/public/rendering/_base.scss
18	src/core/public/rendering/_index.scss

If this issue isn't already assigned to someone and you'd like to take on this work, please ping @BSFishy in the comments and I can assign it to you.