Implement feature to push CSV files to GitHub

[TaiSakuma]

Implement feature to push CSV files to GitHub

[TaiSakuma]

• this feature has been implemented https://github.com/simonsobs/acondbs/pull/23

• the implementation simply pushes the current local branch to the tracking branch. it doesn't set up a tracking branch. the remote and the tracking branch need to be already set in the repo.

• the implementation doesn't explicitly handle the authentication to github. the authentication needs to be handled already. for example, the process owner has the ssh key; the token is embedded in the remote url.