Better documentation is needed for this plugin.

Is your feature request related to a problem? Please describe.
The existing example workflows are all quite simple. They don't well represent a real-world workflow.

Describe the solution you'd like
There should be a new workflow example in the examples/ directory which carries out the following steps:

• create namespace
• create deployment
• delete deployment
• delete namespace

Describe the bug
https://prometheus-api-client-python.readthedocs.io/en/latest/index.html is quite empty. It should have a word about what the library does, how to obtain it, and (links to?) basic usage.