feat: Expand schematic component support from 3 to 13 types + plan dynamic loading

Issue #26 Follow-up: The original fix only supported 3 component types (R, C, LED).
This expands the template-based approach to 13 types while planning for unlimited access.

**Expanded Template (Option 1 - Immediate Solution):**
- Added 10 new component types to template
- Passives: R, C, L, Crystal (4 types)
- Semiconductors: D, LED, Q_NPN, Q_NMOS (4 types)
- ICs: OpAmp, Voltage Regulator (2 types)
- Connectors: Conn_2pin, Conn_4pin (2 types)
- Misc: Switch/Button (1 type)

**Components Now Supported:**
1. Resistor (R)
2. Capacitor (C)
3. Inductor (L)
4. Crystal (Y)
5. Diode (D)
6. LED
7. NPN Transistor (Q_NPN)
8. N-Channel MOSFET (Q_NMOS)
9. Op-Amp (U)
10. Voltage Regulator (U_REG)
11. 2-pin Connector (J2)
12. 4-pin Connector (J4)
13. Push Button/Switch (SW)

**Implementation:**
- Created template_with_symbols_expanded.kicad_sch with all 13 types
- Updated TEMPLATE_MAP with comprehensive type mappings
- Updated project.py to use expanded template by default
- All tests passing (13/13 components added successfully)

**Future Plan (Option 2 - Dynamic Library Loading):**
- Documented comprehensive plan for accessing ALL KiCad symbols (~10,000+)
- Dynamic loading from .kicad_sym library files
- S-expression injection approach
- 6-8 week implementation timeline
- Maintains template fallback for compatibility

**Files Added:**
- python/templates/template_with_symbols_expanded.kicad_sch
- docs/DYNAMIC_LIBRARY_LOADING_PLAN.md

**Files Modified:**
- python/commands/component_schematic.py (expanded TEMPLATE_MAP)
- python/commands/project.py (use expanded template)

This provides immediate value (13 types vs 3) while we plan the long-term
solution of unlimited symbol access through dynamic library loading.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

python/commands/project.py

@@ -58,11 +58,11 @@ class ProjectCommands:
             board.SetFileName(board_path)
             pcbnew.SaveBoard(board_path, board)
 
-            # Create schematic from template (use template_with_symbols for component cloning support)
+            # Create schematic from template (use expanded template with many component types)
             schematic_path = project_path.replace(".kicad_pro", ".kicad_sch")
             template_sch_path = os.path.join(
                 os.path.dirname(os.path.abspath(__file__)),
-                '..', 'templates', 'template_with_symbols.kicad_sch'
+                '..', 'templates', 'template_with_symbols_expanded.kicad_sch'
             )
 
             if os.path.exists(template_sch_path):