Improve ORT's documentation

[tsteenbe]

Creating this ticket to provide an overview of all tickets part of larger effort to improve ORT's documentation

The order of below listed issues may change as this epic progresses.

Tasks

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1. Create an information architecture #7794
   documentation +1
   
2. Don't run code tests for documentation only pull requests #7797
   build documentation +2
3. Detailed information on ORT features #6008
   documentation question +2
4. Document how a source code archive can be created #7795
   documentation +1
5. Improve ORT's general ways of working #4629
   documentation enhancement +2
   
6. Add Evaluator documentation #1236
   documentation evaluator +2
   
7. Add the Advisor to the getting started tutorial #4219
   documentation hacktoberfest help wanted +3
8. Create examples for all kinds of plugins ORT supports #4636
   documentation plugin +2
9. Add documentation for published Docker images #7781
   docker documentation +2
10. Please consider making example configuration files public domain #4298
    documentation question +2
11. Missing documentation for ivy version ranges #7223
    documentation good first issue help wanted +3
12. Document how to use external ORT plugins #7807
    documentation plugin +2

[sschuberth]

FYI, there's a new IntelliJ plugin from JetBrains called Writerside which might become useful here.