Single source package

[sndrs]

Release PRs often seem to throw up surprises.

We've probably got a slightly off config, so look into it to understand fully how changesets works and what we want.

### Tasks
- [x] Add storybooks
- [x] Add tests and linting etc.
- [x] Add scripts to generate code
- [ ] https://github.com/guardian/csnx/issues/1439
- [x] Consolidate ReadMes
- [x] update devkitc to use new package
- [x] Code freeze for current packages
- [x] Move code into single source package
- [x] re-disable passing jest tests with no tests
- [x] Separate storybook into foundations and react components, add chromatic
- [x] Deprecate eslint plugins
- [x] Release new packages
- [x] Deprecate old packages
- [x] Comms
- [x] update storybook repo with new source packages
- [x] Check repo for references to old packages
- [ ] Remove old readmes