[Suggestion] Include Special Character Class Resources

Apple Developer resources have documentation regarding character classes in UI kit. This information could be useful if republished here for individuals who are crafting new rulesets particularly for special characters, as many sites are nebulous about exactly what characters they support, requiring some trial and error.

Example Special Characters Sets:
Apple : -~!@#$%^&*_+=`|(){}[:;"'<>,.? ]
OWASP: !"#$%&'()*+,-./:;<=>?@[]^_`{|}~

Start by reviewing the repository’s existing resource documentation and the Apple and OWASP character-set examples named in the issue. Identify the appropriate documentation location and format, then add clearly sourced special-character guidance that matches the project’s conventions.

Written by the indexing model from the issue text.