Add WCAG checks (hopefully to precommit)

Description

#11 (closed) acceptance criteria has the our frontend should meet WCAG 2.2 Guidelines. This should be automated to ensure further updates continue to do so.

Ideally, this is done via pre-commit but at least as a CI test.

Task list

• Investigate ways to automate these checks via pre-commit
• Implement in pre-commit

Acceptance criteria

• Future code changes are enforced to still meet WCAG guidelines

Further Links

One possible option: https://github.com/dequelabs/axe-core (but investigate other options as well).