[FA-20} Adding direct execution and documentation

[scott-clare1]

This PR adds allowing running with direct execution and then some documentation explaining how servers and clients communicate.

Checklist

Please ensure you have done the following:

• I have updated the documentation if required.
• I have added tests which cover my changes.

Type of change

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• Bug Fix (non-breaking change, fixing an issue)
• New feature (non-breaking change to add functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Other (add details above)

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