Accept + implement ADR-010 frontend plugin hooks (contract 0.7.0)

Four data-only hooks on BasePlugin (get_settings_cards,
get_asset_panels, get_map_overlays, get_asset_presentation) with a
GET-only /api/pluginui consumer surface copying the dashboard-widgets
semantics. Pilots: warranty declares its asset panel; measuringtools
supplies its settings card, presentation, and calibration overlay -
the last hardcoded settings-nav entry is now hook-sourced. Generic
renderers for panels/overlays/presentation deferred per the ADR's
incremental adoption plan (documented in CONTRACT-STABILITY.md).

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

docs/PLUGIN-QUICKSTART.md

@@ -122,6 +122,10 @@ Override hooks on the plugin class as needed. See [PLUGIN-HOOKS.md](PLUGIN-HOOKS
 | `get_navigation_items` | Plugin shows up in the sidebar nav |
 | `get_dashboard_widgets` | Plugin's dashboard widget appears on the home page |
 | `get_reports` | Plugin's report cards appear on the Reports hub |
+| `get_settings_cards` | Plugin's card joins the settings rail + landing (no `settingsNav.js` edit) |
+| `get_asset_panels` | Plugin panel renders on matching asset-detail pages |
+| `get_map_overlays` | Plugin decorates shop-floor map markers + adds a legend entry |
+| `get_asset_presentation` | Plugin declares its asset type's search icon + detail route |
 | `get_collector_schema` + `apply_collector_payload` | Plugin accepts external pushes at `/api/collector/<name>` |
 
 Each hook has a default that does nothing. Override only what your plugin needs.