Adds namespace support to the UI:
1. Namespace CRUD/management
2. Show Namespace in relevant areas (intentions, upstreams)
3. Main navigation bar improvements
4. Logic/integration to interact with a new `internal/acl/authorize` endpoint
This includes an update of our CSS npm module. The majority of this is
just moving files from one folder to another.
1. %breadrumbs: As well as moving we've added 'milestone' breadcrumbs
2. %checkbox-group: Moved
3. %radio-group: Moved
4. %sliding-toggle: Moved (used to be called just %toggle)
5. %form-elements: Moved and added a new %inline-alert for form field
messaging (see Structure design system)
6. %action-group is now a composition of %menu-panel, %toggle-button,
plus edits to existing style to bring the %action-groups inline with the
dropdowns from Structure). %action-group also includes a composed
%confirmation-alert that is yet to be include. This will be compiled out
until we integrate it.
We've also removed some of our old icon placeholders as the above
work seased to use some of them.
Now we done this I'd say all in all over half of our CSS components now
use the CSS npm module.
The CSS specific to Consul UI also uses much of this CSS module by way
of helper placeholders such as our %frames.
1. Rebuild the heathchecked-resource component now we can copy and paste
2. As the above rebuild came with new icons, we also swapped out 'most'
of the other areas where we were using these new icons, plus any icons
that were effected by the new icon placeholders
3. Begin to remove more and more of the project specific icons (now
replaced by the shared ones)
Kenia