Documentation-only finish for FN-3087, adding changeset and README updates for the dependency graph plugin and plugin authoring guide.
Fusion-Task-Id: FN-3087
Merged FN-3157 to add a plugin dashboard views system, including a plugin view registry with lazy loading, navigation integration for Header and MobileNavBar, a usePluginDashboardViews hook with cache and refetch support, and tests covering the no-loader path. Also added documentation in `docs/PLUGI
Fusion-Task-Id: FN-3157