Update beginner tutorial: Change front end, suggestions for localhost running, reformat tutorial

[Justin-Zwart]

This PR was created to change a number of outdated features in the beginner tutorial, and add some clarity.

New features:

• mention an easy way to run backend without auth in on localhost
• update links to point to the correct location in the documentation
• merge "overview" and "scenario" into one cohesive file explaining all the top-down approach
• update debian.md and start_applications.md files to work with orchestrator-ui instead of orchestrator_core_gui

Continued work before this PR is ready to submit:

• there is no explanation for how to set up the orchestrator-ui in macos, as I do not have the ability to set up / test
• the dockerfile in the associated beginner orchestrator and the docker tutorial have not been updated to use the orchestrator-ui, as I have been running my setups manually.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.43%. Comparing base (70b0617) to head (bc273de).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #733   +/-   ##
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  Coverage   83.43%   83.43%           
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  Files         188      188           
  Lines        9287     9287           
  Branches     1523     1523           
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  Hits         7749     7749           
  Misses       1274     1274           
  Partials      264      264           

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[pboers1988]

@Justin-Zwart Thanks for the contribution. If you don't mind could you make sure it gets through pre-commit? Then we can accept.

[pboers1988]

Pre-commit (linting) is failing

[Justin-Zwart]

@Justin-Zwart Thanks for the contribution. If you don't mind could you make sure it gets through pre-commit? Then we can accept.

Hi Peter,

I am happy to update the linting in the next couple of days. I have been super busy with the start of my school term. I also need someone other than myself to make progress on some of the code which I am not able to complete myself. I mention this in the description of the PR. For example I am not updating the docker and haven't tested it on Mac.