feat(internal): Allow logJSON and nested fields to be passed through to commit body templating (#6347)

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

Co-authored-by: Yura Beznos <yury.beznos@ocado.com>
Co-authored-by: Jamie Magee <JamieMagee@users.noreply.github.com>
Co-Authored-By: Michael Kriese <michael.kriese@visualon.de>
Co-Authored-By: Rhys Arkins <rhys@arkins.net>

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

Co-authored-by: Rhys Arkins <rhys@arkins.net>

Closes #6291

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

Refs #6283

To revert to old behaviour, configure unicodeEmoji=false.

BREAKING CHANGE: emoji’s now default to using unicode

BREAKING CHANGE: path for the config validator is now in lib/ and dist/ and not bin/