feat: messaging for common errors

[cslong]

Description of changes: Add function to scan log file for common errors and report to customer in flash bar.

Checks for these messages:

1. Missing MSBuild Path
2. Unauthorized Access Exception
3. Duplicate Packages in package.json

Testing done: Add unit test that scans test file for errors. Manual testing in UI by adding error lines from previous on-call into back-end log.

Merge Checklist

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• [x] I have added tests that prove my fix is effective or that my feature works (if appropriate)
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