Feature-#70: Implemented --no-reload flag

[yushao2]

What's Changed

closes #70 and closes #78 if merged

Technical Description

• Added a new boolean flag --no-reload
  Usage: python cli.py dashboard --no-reload
• Upon first render, the process terminates

[apoclyps]

This morning I checked out the feature branch to run it locally. I think this is as close to the desired behaviour that we will be able to reach using the current render method. I'm going to spike another approach before deciding if we want to merge this.

The first render happens as soon as the live context manager is called - which results in a flicker of the TUI whilst waiting for Github to return all the data requested. This approach does exist correctly after the UI is updated and maintains the view. If we cannot remove the flicker, this approach is good enough for now 👍