• Addresses a serious TypeError in 5.0.1.

Developer changes

These changes consolidate logic and reduce duplication.

• Fix Lang.sprintf() argument handling and adjust regex behaviour.
• Initialize and centralize many constants (stopwords, placeholder sets, link/file type patterns, click/new-window regexes).
• Introduce pushResult helper to standardize pushing results to State.results and migrate callers to use it.
• Refactor all ruleset files to utilize pushResult helper, significantly consolidating code.
• Improve contrast preview rendering by setting styles on the preview element instead of inline HTML building.
• Change annotation insertion order to prefer link/button targets before svg fallbacks.
• Adds CI tweaks (CodeQL config file and publish workflow permissions).