Readme Revitalization

[LCVcode]

Problem

README.md is out of date.

Proposed Feature

Make all below listed changes to README.md. I will update this list as needed.

Additional Context

With this issue, #12 becomes stale and will be removed.

Not-necessarily-comprehensive list of required changes:

• Example commands - similar to those from juju-jockey info (include dot notation and how to use @)
• Development setup tutorial (poetry install and poetry shell)
• Installation tutorial (via snap and/or others)
• Documentation and tutorials/examples for all remote Juju options
• Tutorial for viewing the docs locally