Feature/2 multi packages

[pospi]

resolves #2

The storybook config seemed to be brittle. Never got it working even before I started refactoring. So have updated that toolchain.

Some things I'd like to clean up / fix (but please feel free if you'd like to take over)

• I think ScopedElementRegistry needs to be injected into Storybook somehow 'cos nothing renders
• individual component exports need to be tested (i.e. importing sub-paths)
• I'm not that familiar with https://www.typescriptlang.org/docs/handbook/project-references.html so have removed that to get things running. @nick-stebbings may want to restore it, as well as setting up some useful inheritance for tsconfig.json with extends so that the two configs under each package are no longer duplicated.

Created additional issues for the crossed out items above. #5 , #6

[pospi]

@nick-stebbings I made good progress with this today- CustomElements turned out to be a little complicated to fix, including changing the Shoelace lib being used. The components are now rendering but some look a little visually weird and I think I'd have to hand over to you in order to know what is left to clean up there. Hopefully just missing styles. Some other polish one of us may want to do in tying this off:

• finish importing fonts (I made a start on Manrope but the others are still missing). This includes ensuring the CSS is setup in a browser-compatible way.
• inject styling into the Storybook rendering so that all components render against the standard NHs background colour

[nick-stebbings]

Great @pospi I will look over it and review tomorrow morning. I am working this weekend a bit, think you said you also were so we might be able to get it all tied up.

I posted re: the fonts stuff on discord but not sure you saw it. It can be imported from the styles package.