docs: update README

fix: allow attributes in sourcecode match for surround bcp14 keywords…

… tool

feat: surround BCP 14 keywords in <bcp14> tags

feat: peek, expand, fold xi:include / references tags

feat: add remaining typos validation checks

feat: list inconsistent capitalization tool

fix: add remaining inclusive language term list

feat: author names preferences check

feat: lookup selection across docs

fix: allow at symbol in sourcecode attributes