Changes to Get all Dolt branches with context

the timestamp response's property format changed from date-time to no format for status 200

the response property timestamp became required for the status 200

added the required property branches/items/branch to the response with the 200 status

added the required property branches/items/dirty to the response with the 200 status

added the required property branches/items/hash to the response with the 200 status

added the required property branches/items/latest_commit_date to the response with the 200 status

added the required property branches/items/latest_commit_message to the response with the 200 status

added the required property branches/items/latest_committer to the response with the 200 status

added the required property branches/items/latest_committer_email to the response with the 200 status

added the required property branches/items/name to the response with the 200 status

added the required property branches/items/remote to the response with the 200 status

endpoint added