Concrete before/after tailwind.config.js examples grounded in the
actual current state of each consumer, not hypothetical:
- dashboard-ng: its real local generatePalette/themes block and
  ui-components theming.js plugin call (to be deleted), replaced by
  themeProvider()+themeConsumer() with no args, now that the correct
  brand values are the package defaults. Notes the separate raw
  mindicity/mindicity-dark/blue color scales are a different
  mechanism, out of scope.
- manager-ng: no existing theming plugin to remove (verified) --
  a plain addition alongside its own utilities/icon-size plugins.
- Widgets: demanio-widget's actual pattern (local color scale +
  typography plugin, no theming at all) as the "before", showing
  themeConsumer() added alongside existing plugins without removing
  anything, migrated gradually.

Also documents that reading from the gitlab-di.mindicity.it registry
needs no auth token (verified via curl: unauthenticated GET returns
200) -- only publishing does.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>