chore: fix various issues with tooling, tests, etc

[davidjgoss]

• Fix tsconfig to see scss files (fixes TS Compilation error with scss running tests #6)
• Add gherkin test data locally (until we can depend on it externally somehow)
• Generate acceptance fixtures via node script, remove makefile (fixes Remove Make #10)
• Remove module type hints from package.json to unconfuse storybook (fixes Can't build storybook #8)
• Don't ignore the lockfile
• Add tsc config to build library to dist
• Fix some issues with status counting

[aslakhellesoy]

I've fixed the failing tests, but they still seem to be hanging. I don't know what tests are hanging yet.

[davidjgoss]

Weird one. From the run output it looks like all the tests finish, but something maybe not cleaned up from one of them. I'll take another look today.

[davidjgoss]

Okay this gets us to a workable project, just needs the release workflows adding. I'll raise a separate issue to find the root cause of the leaky test, in the meantime adding exit: true in the mocha config is enough to force it.