CLI helptext cleanup into --help and --help-long

[lidel]

Note from GO triage:

• Our command descriptions are not leveraging ShortDescription and LongDescription to the fullest
• LongDescription is often too long for --help, for example ipfs add --help – see Expand rolling chunker documentation #8952

Proposed cleanup

Audit all commands and make sure each has a reasonable short and log description.

Desired UX would be:

• enhance the way we use https://github.com/ipfs/go-ipfs-cmds/ to support --help and --help-long
• ipfs foo --help should print ShortDescription
  • if LongDescription is present, ShortDescription should have a footer saying "For more information pass --help-long"
• • ipfs foo --help-long should print LongDescription is present, and fallback to ShortDescription otherwise

https://docs.ipfs.io/reference/api/cli/ would default to --help-long