[Story-1006] Redesign Matter Configuration around Matter Templates

sequenceDiagram
  autonumber
  participant browser as Browser
  participant router as App Router
  participant gateway as Gateway
  participant storybook as Storybook
  browser->>router: open settings
  router->>router: matter-types → matter-templates redirect
  router->>gateway: fetch MatterTemplate contracts
  gateway->>router: validate contract schema
  router->>browser: render detail page
  storybook->>storybook: fixtures use new vocabulary