Add dev branch and a "release" github action to update main

[jtyoung84]

Is your feature request related to a problem? Please describe.
It isn't clear which version of aind-data-transfer-service is being run.

Describe the solution you'd like
We should tag which version is stable and which is in development. We should have a github action which will release a main branch.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.