Move UI package to Pubsweet monorepo
Now that @pubsweet/ui
is published we can use that instead and remove the package from here.
Also
- make
xpub-styleguide
extend@pubsweet/styleguide
to just add theJournalProvider
. - make
xpub-theme
extend@pubsweet/theme
to house any xpub-specific parameters
Closes #68 (closed)