split ai test into its own file, fix it, and enable testIsolation on all tests

[circlecube]

Proposed changes

This fixes the flaky theme test that sometimes fails. Also, adds testIsolation true so tests are more reliable and run from a blank slate and added some utility functions to use across tests in the module. Doing this, I also split the ai notification test into its own file so it was more manageable.

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Video

Checklist

• I have read the CONTRIBUTING doc
• I have viewed my change in a web-browser
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments