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/component_schematic.py

@@ -10,11 +10,39 @@ class ComponentManager:
 
     # Template symbol references mapping component type to template reference
     TEMPLATE_MAP = {
+        # Passives
         'R': '_TEMPLATE_R',
         'C': '_TEMPLATE_C',
+        'L': '_TEMPLATE_L',
+        'Y': '_TEMPLATE_Y',
+        'Crystal': '_TEMPLATE_Y',
+
+        # Semiconductors
         'D': '_TEMPLATE_D',
-        'LED': '_TEMPLATE_D',
-        # Add more mappings as needed
+        'LED': '_TEMPLATE_LED',
+        'Q': '_TEMPLATE_Q_NPN',
+        'Q_NPN': '_TEMPLATE_Q_NPN',
+        'Q_NMOS': '_TEMPLATE_Q_NMOS',
+        'MOSFET': '_TEMPLATE_Q_NMOS',
+
+        # ICs
+        'U': '_TEMPLATE_U_OPAMP',
+        'OpAmp': '_TEMPLATE_U_OPAMP',
+        'IC': '_TEMPLATE_U_OPAMP',
+        'U_REG': '_TEMPLATE_U_REG',
+        'Regulator': '_TEMPLATE_U_REG',
+
+        # Connectors
+        'J': '_TEMPLATE_J2',
+        'J2': '_TEMPLATE_J2',
+        'J4': '_TEMPLATE_J4',
+        'Conn_2': '_TEMPLATE_J2',
+        'Conn_4': '_TEMPLATE_J4',
+
+        # Misc
+        'SW': '_TEMPLATE_SW',
+        'Button': '_TEMPLATE_SW',
+        'Switch': '_TEMPLATE_SW',
     }
 
     @staticmethod