v7.0

• btrfstune: add ability to do offline conversion to the remap tree (experimental feature)
• mkfs: add hole detection when precalculating size for --rootdir
• fixes: recognize fs-verity tree items in various tools (check)
• enable PCLMUL implementation on Musl (previously using SSE 4.2 at best)
• help format changed to be in line with common packages like util-linux
• reject writes to filesystem during check/btrfstune in case there's pending state of device replace or balance
• other:
  • build ARM64 static binaries (attached to GH release) backward compatibility level is 'archv8-a'
  • CI updates
  • documentation updates