v5.4.2
docs: Add Jekyll and theme config
docs: Add Jekyll front matter for existing pages
Merge pull request #727 from bgilbert/ipv6
docs: Use upstream theme & update to 0.4.1
*: rename master branch to main
docs: Add usage & development pages
cargo: update MSRV to 1.66
docs: add release notes
docs/release-notes: update for release
*: remove cl-legacy feature