Prepare test utilities for publishing as a separate module

[timkimadobe]

Task description

We want to provide the:

1. JSON comparison system
2. Event test capture and assertion system (TestBase + InstrumentedExtension)

For general availability to other extensions to use in their own test suites. Investigate what is required for publishing as a separate module from the base Edge extension itself (like AEPServices from AEPCore)

Since the use case is for testing only, the size of the module itself is not as much of a concern

Additional implementation details or code snippet(s)

No response