Draft ADR-010 frontend hook contract; relabel Equipment to Machines

ADR-010 (PROPOSED): four data-only frontend hooks following the
get_reports precedent - get_settings_cards, get_asset_panels,
get_map_overlays, get_asset_presentation - batched as a future contract
0.7.0. Warranty proves asset panels first, measuringtools the rest;
accept only after both run on the hooks.

Display-label swap Equipment -> Machines across nav, list, form,
detail, search, map editor, and settings copy (incl the API-failure
fallback nav). Identifiers unchanged: plugin name, tables,
/api/equipment, asset type, and routes all stay.

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

docs/adr/README.md

@@ -22,6 +22,7 @@ Each ADR captures a single architectural decision: the context, the decision its
 | [007](ADR-007-product-versioning-and-releases.md) | Product versioning and releases | ACCEPTED |
 | [008](ADR-008-plugin-migration-ownership.md) | Plugin migration ownership (per-plugin chains) | ACCEPTED |
 | [009](ADR-009-frontend-plugin-gating.md) | Frontend plugin route gating | ACCEPTED |
+| [010](ADR-010-frontend-plugin-hooks.md) | Frontend plugin hook contract | PROPOSED |
 
 ## Authoring