This change adds checks for the `Change-Id` and `Signed-off-by`
trailers. These are already required by Gerrit, so they have been
configured as warnings as an early heads-up after committing without
needing to push.
This also renames the commitlint configuration file to align it with
the style used by Standard Version when it's eventually introduced:
`commitlint.config.js` -> `.commitlintrc.js`
Change-Id: I4e3c158e6b3a5407fabd873360d5efce86ebd19e
Signed-off-by: Chris Kay <chris.kay@arm.com>
Chris Kay