Refactor log watcher helpers

[nnarayen]

🚀 What

Pure refactor of log functionality, I think after seeing the structure it's better to just nest all of these files under cli/. They're all logically related, and then we don't have to worry about rich dependency leaking. I don't imagine anybody outside the CLI will need this functionality.

New directory:

  > > cli
    > > logs
        > base_watcher.py
        > model_log_watcher.py
        > training_log_watcher.py
        > utils.py

💻 How

🔬 Testing

$ truss push my_model.py --tail --remote baseten-localhost --publish
$ truss train push config.py --remote baseten-localhost --tail

[nnarayen]

@rcano-baseten I moved into the log watcher, so now it can be shared across both truss train logs and truss train push --tail`

[rcano-baseten]

makes sense to me!