Add better debug workflows for testing

[ganemone]

We should have an easy way to run your tests in debug mode for both browser and node tests.

[supersonicclay]

It looks like fusion test --debug works for me. But fusion test --debug --watch does not hit my breakpoints.

[supersonicclay]

I was able to get debugging with watch working by passing the --no-cache flag to jest.
jestjs/jest#6683 (comment)

Here's the full command that works for fusion.

JEST_ENV=dev node --inspect ./node_modules/.bin/jest --config=./node_modules/fusion-cli/build/jest/jest-config.js --runInBand --watch --no-cache

[KevinGrandon]

I think that this ticket was made before we had the --debug option, so going to close this for now. We will either add or passthrough --no-cache when debug is set.