title: Bitbucket Cloud: "Approve" a commit
body: <p>We are using Bitbucket Cloud and trying to incorporate some approval system in our workflow. Instead of a reviewing the whole diff for a pull request, we would like to review per commit. There is an 'Approve' button on each commit, but I can't seem to figure out what this does.</p>
  <p>What we would like to do ideally is to incorporate a merge check on a pull request, where each commit in the pull request must be approved by one reviewer at least. As I am unable to figure out what the 'Approve' button does, I am not sure where to start with the merge check.</p>
  <p>Is this possible with Bitbucket Cloud? If not, is there a different way we can approach this problem? We are aware commit level reviews are not supported on Bitbucket Cloud.</p>