New: Added _uniqueInteractionIds, testing support for cmi.interactions

[oliverfoster]

fixes #277

New

• config.json:_spoor._advancedSettings._uniqueInteractionIds = false to allow control over unique cmi.interactions.n.id entries
• Switched cookeLMS to store values in nested objects and arrays rather than as a hash of key value pairs (backward compatible), such that it's possible to properly test the cmi.interactions property. In the future cmi.objectives, cmi.comments_from_learner and cmi.interactions.n.objectives.m can be easily added to the scorm_test_harness.html cookie lms as a result

The cookie lms will look like this now:

Instead of this:

SCORM 2004 v4 Spec, RTE-4-5: Only support for cmi.interactions has been added to the testing environment.

1. 
2. 

Testing

Running from scorm_test_harness.html, in the console, window.API.LMSGetValue('cmi.interactions._count') should return 0 initially and then the number of interactions if any questions are answered.

[github-actions[bot]]

:tada: This PR is included in version 5.7.0 :tada:

The release is available on GitHub release

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