feat(schematic): batch component authoring + connection tools

Adds batch authoring tools that collapse the dozens of round-trips needed to
stand up a schematic into a handful: batch_add_components,
batch_edit_schematic_components, replace_schematic_component,
batch_add_no_connects, batch_connect, and batch_add_and_connect (place a set of
parts and wire them in one call). These reuse the existing single-item handlers
internally, so behavior matches exactly.

- python/commands/schematic_batch.py: SchematicBatchCommands(iface)
- python/commands/schematic_text_utils.py: shared .kicad_sch text helpers
- src/tools/schematic-batch.ts + registry 'schematic_batch' category
- python/kicad_interface.py: import + instantiate + dispatch routes
- tests/test_schematic_batch.py: 13 unit tests

Note: schematic_text_utils.py is also shipped by the field-placement and
hierarchy PRs; if those merge first, drop the duplicate copy on rebase.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

python/kicad_interface.py

@@ -327,6 +327,7 @@ try:
     from commands.schematic import SchematicManager
     from commands.schematic_hierarchy import SchematicHierarchyCommands
     from commands.schematic_field_layout import SchematicFieldLayoutCommands
+    from commands.schematic_batch import SchematicBatchCommands
     from commands.symbol_creator import SymbolCreator
     from commands.symbol_pins import SymbolPinCommands
 
@@ -453,6 +454,9 @@ class KiCADInterface:
         self.hierarchy_commands = SchematicHierarchyCommands(self)
         # Schematic field placement / layout-check commands
         self.field_layout_commands = SchematicFieldLayoutCommands()
+        # Batch schematic authoring commands (need an interface back-reference for the
+        # single-item add/edit/get handlers, footprint library, and sub-sheet fixer)
+        self.batch_commands = SchematicBatchCommands(self)
 
         # Initialize JLCPCB API integration
         self.jlcpcb_client = JLCPCBClient()  # Official API (requires auth)
@@ -547,6 +551,13 @@ class KiCADInterface:
             "set_schematic_property_position": self.field_layout_commands.set_schematic_property_position,
             "batch_set_schematic_property_positions": self.field_layout_commands.batch_set_schematic_property_positions,
             "autoplace_schematic_fields": self.field_layout_commands.autoplace_schematic_fields,
+            # Batch schematic authoring commands
+            "batch_add_components": self.batch_commands.batch_add_components,
+            "batch_edit_schematic_components": self.batch_commands.batch_edit_schematic_components,
+            "replace_schematic_component": self.batch_commands.replace_schematic_component,
+            "batch_add_no_connects": self.batch_commands.batch_add_no_connects,
+            "batch_connect": self.batch_commands.batch_connect,
+            "batch_add_and_connect": self.batch_commands.batch_add_and_connect,
             # JLCPCB API commands (complete parts catalog via API)
             "download_jlcpcb_database": self._handle_download_jlcpcb_database,
             "search_jlcpcb_parts": self._handle_search_jlcpcb_parts,