v6.3

• 85bb8b9 chore: bump version to 6.3 (Alexandr Savca)
• ae5c878 pkgchk: fix symlink owner lookup with --root (Alexandr Savca)
• 8dcbb24 docs: mention pkgchk in README (Alexandr Savca)
• 48e6a6b build: hook pkgchk into build and man pages (Alexandr Savca)
• 0454c05 completion: add bash completion for pkgchk(1) (Alexandr Savca)
• c7b30b6 pkgutils: add pkgchk utility (Alexandr Savca)
• 4d68886 .editorconfig: set max_line_length = 70 (Alexandr Savca)
• d8f1dbd pkgutils: reflow file headers and comments (Alexandr Savca)
• 3b9a457 libpkgutils: refine source comments (Alexandr Savca)
• e0374cf repo: add .editorconfig for C++ sources (Alexandr Savca)
• 707d0fa pkgutils: refine source comments (Alexandr Savca)
• b191c14 ci: unify build workflow path anchors (Alexandr Savca)
• 720afc4 chore: simplify .gitignore entries (Alexandr Savca)
• 16a982b docs: remove TODO.md in favor of GitHub Issues (Alexandr Savca)
• ec15b4c docs: refine README wording and structure (Alexandr Savca)
• 45f0165 ci: adjust Alpine build dependencies in musl job (Alexandr Savca)
• 8b179c9 ci: add Release CI workflow (Alexandr Savca)
• 290b946 ci: restructure build workflow with path filters and musl job (Alexandr Savca)
• 7b899c0 docs: minor consistency fixes (Alexandr Savca)
• fd5d0c9 docs(man): packages.7.scdoc: improve fixme comment, resort SEE ALSO (Alexandr Savca)
• 4e5a533 docs(COPYRIGHT): update years, resort, fix team url (Alexandr Savca)
• 8317c4d docs(README.md): minor cosmetic changes (Alexandr Savca)
• 9eda2ab src: minor cosmetic changes (Alexandr Savca)