Restructure project and move cli commands to root level.

[Bubblyworld]

Does a bunch of clean-up stuff. I've removed a lot of the sys.path patches that seem to have infected a lot of modules, and tried to restructure the codebase in a more consistent way:

• sameproject/cli now contains cli command code, like run/version/etc
• sameproject/data now contains data objects like Step, SameConfig etc
• sameproject/ops now contains core functionality like notebook parsing

This change also moves the program run command to the base level, so we can now run same pipelines with same run -f same.yaml. Next steps:

• add init and verify commands for creating and verifying same config files
• move sameproject/backends code into the ops module

[Bubblyworld]

New CLI layout (keeps program run for backwards compatibility for now, we need to update docs)

[github-actions[bot]]

Unit Test Results

  1 files    1 suites   39s :stopwatch: 62 tests 50 :heavy_check_mark: 12 :zzz: 0 :x:

Results for commit 1aecdf37.