Add cli commands

[Leahh02]

This PR adds cli commands for the curl requests for the ci demonstrator. I implemented it very similarly to the way the requests are implemented in the ci demonstrator, but I can change it to use the requests library, for instance.

[kchilleri]

Tested these commands through Gitlab CI pipeline and they all work as expected. I'm going to think of possible unit tests now and look at the actual code.

@pagrubel do we want this remote stuff to be a part of our documentation?

[Leahh02]

I added some simple documentation to rest_api.rst, we will discuss the location and content.

I realized I didn't add any error handling into remote_client.py, I will consider adding this.

[Leahh02]

I learned about modules to test fastapi apps: https://fastapi.tiangolo.com/tutorial/testing/ and a module to test typer apps: https://typer.tiangolo.com/tutorial/testing/