cli: rearrange versioning commands

[pgavlin]

Reparent everything having to do with managing versions under the esc env version command and rearrange the command structure somewhat:

• esc env version: decribes a revision or tag
• esc env version history: show revision history
• esc env version tag: create or update a tagged revision
• esc env version tag ls: list tagged revisions
• esc env version tag rm: remove a tagged revision

[cleverguy25]

Some nits from our conversation earlier but those could be a followup PR

[pgavlin]

Some nits from our conversation earlier but those could be a followup PR

Yeah I didn't want to mix those changes in with this refactor. "final" in the CL just refers to the arrangement of the commands