feat: add 11 missing schematic inspection & editing tools

Add all missing schematic operations identified in the gap analysis:

Inspection (P0/P2):
- list_schematic_components: enumerate all components with refs, values, pins
- list_schematic_nets: list all nets with their connections
- list_schematic_wires: list all wire geometry
- list_schematic_labels: list net labels, global labels, power flags

Editing (P0/P1):
- annotate_schematic: assign ref designators to unannotated components (R? → R1)
- move_schematic_component: reposition placed symbols
- rotate_schematic_component: rotate/mirror placed symbols
- delete_schematic_wire: remove wires by coordinates
- delete_schematic_net_label: remove labels by name/position

Export (P1):
- export_schematic_svg: schematic SVG export via kicad-cli
- export_schematic_pdf: enhanced with file path return & blackAndWhite support

Also registers list_schematic_components and annotate_schematic as
direct tools (always visible) since they're prerequisites for
reference-based workflows.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/tools/registry.ts

@@ -83,17 +83,28 @@ export const toolCategories: ToolCategory[] = [
   },
   {
     name: "schematic",
-    description: "Schematic operations: create, add components, wire connections, netlists",
+    description: "Schematic operations: create, inspect, add/edit/delete components, wire connections, netlists, annotation",
     tools: [
       "create_schematic",
       "add_schematic_component",
+      "list_schematic_components",
+      "move_schematic_component",
+      "rotate_schematic_component",
+      "annotate_schematic",
       "add_wire",
+      "delete_schematic_wire",
       "add_schematic_connection",
       "add_schematic_net_label",
+      "delete_schematic_net_label",
       "connect_to_net",
       "get_net_connections",
+      "list_schematic_nets",
+      "list_schematic_wires",
+      "list_schematic_labels",
       "generate_netlist",
-      "sync_schematic_to_board"
+      "sync_schematic_to_board",
+      "export_schematic_svg",
+      "export_schematic_pdf"
     ]
   },
   {
@@ -141,6 +152,8 @@ export const directToolNames = [
 
   // Schematic essentials (always visible so AI uses them correctly)
   "add_schematic_component",
+  "list_schematic_components",
+  "annotate_schematic",
   "connect_passthrough",
   "connect_to_net",
   "add_schematic_net_label",