The aim of this patch is to help relax the quorum checks in the remote helper.

See the commits for more details.

Note that it is currently in a draft state since I would want to replace the old quorum function with the new Canonical type.

Changes:

• Rebased on 3260046c67d03c5b161fcfdb148876e9cb9a0733

Changes:

• Rebase on 6f91f2fb8fc29d8ecac9653411918ab48a6fc44e

Changes:

• Rebase
• Remove quorum function in favour of Canonical::quorum method, and port over tests.
• Folded commit for warn function in the remote helper into the other remote helper changes to avoid the dead code clippy warning.

Changes:

• Fix typos
• Remove --description option now that it’s optional
• Introduce Unrelated variation to simplify relation checks
• Move commit_relation into a top-level function

Changes:

• Account for being able to rollback to a previous canonical tip

Changes:

• Rebased
• Simplify commit relation logic to checking if the commit converges