As a developer I want to track arbitrary branches

[kdmccormick]

Copied in from the existing backlog. Needs grooming.

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This is possible, but not easy:

• Need docs, at least
• A plugin that checks outs branches could be a possibility.
• Hot reloading already works.

Tutor works seamlessly with arbitrary branches of Open edX repositories including main/master

Note: this is already possible, but the difficulty resides in tracking upstream changes from the master branch.

[regisb]

All technical features are in place to close this issue. Running up-to-date master branches is documented here: https://docs.tutor.overhang.io/tutorials/nightly.html
I believe that the only thing that might be missing is a good step-by-step tutorial on how to run a fork of edx-platform, or some other IDA.

[kdmccormick]

Closing this so that we can consolidate discussion into #43