Add transparent Git+Dolt integration (aka Ressurect git-dolt)

Hey folks,

My team is currently using DoltHub to store training data and are making modifications to the data in a distributed manner.

I would like git-dolt to be resurrected so that working with git + dolt is easy and people don't forget to run the dolt commands when they run corresponding git commands.

My expectations of what git-dolt would ideally do are:

git checkout loads the corresponding dolt branch
git branch makes a new dolt branch
git merge merges the appropriate dolt merge
git rebase also results in dolt rebase
git commit does a dolt commit
git push does a dolt push

If the dolt command fails, then the git command should also fail and vice versa - having data merged in dolt without code merged and vice versa would be an ugly situation.

In an ideal world git status would also show dolt status.

In an ideal world this workflow wouldn't require starting/stopping the dolt sql-server.

In an ideal world, a GitHub PR would result in a DoltHub PR and the workflow around those would be nice, alternatively if there is a set of manual steps we need to take, some sort of GitHub commit hook that makes sure we haven't forgotten to do the manual steps would be helpful.

In writing this, I also see that dolt doesn't support rebase; the main use case for us is avoiding interleaving commits from multiple branches when merging into main and squashing branches into single commits. I'm not intimately familiar with rebase myself, so I am not clear on how hard this would be to implement, or if there is a replacement we can do, but wanted to get this out there as a desire.

LMK if these expectations are not currently supported/unrealistic, etc, but I wanted to get my full list of desires out there :)