feat(logger): Add log buffer and flush method

[ConnorKirk]

Summary

This PR implements basic buffering logic to the logger utility, and the flushLogger method for flushing the buffered logs.

Changes

• Move logBuffer test files to logBufferStructures test file.
• Add the bufferLog and flushBuffer methods to the Logger class. The buffer functionality is disabled at the moment.

Other things to note:

• I added a property to set the log buffer threshold (log buffer level?). I needed to do this to test an edge case and meet coverage requirement. In this PR it isn't configurable but could be in future. The feature request originally specified buffer logs equal or less than debug.
• I was wondering about a possible edge case - At the moment each set in the logger buffer is limited to a max size. There isn't a mechanism to limit the number of sets in the buffer. Probably a contrived issue, but might be worth considering.

Issue number: closes #3590

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[dreamorosi]

Great job, Connor!

The PR is in a really good state already, I have left a few minor comments mainly about project conventions and similar, but the implementation looks good overall.

I haven't focused too much on tests beyond looking at coverage since I expect that we'll need to refactor some of them after we make the methods public.

While you address the comments, also please look at these from the SonarCloud scanning.

Tomorrow morning I'll do a quick test in a Lambda function mainly to validate the logic around the X-Ray trace ID and if everything looks good we'll merge it as soon as the feedback below is addressed.

Great work again!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dreamorosi]

Great work on this Connor, and congrats for getting your first PR merged in this repo!