feat: Week 1 complete - Linux support + IPC API prep

🎉 Major v2.0 rebuild kickoff - Week 1 accomplished!

## Highlights

### Cross-Platform Support 🌍
- ✅ Linux primary platform (Ubuntu/Debian tested)
- ✅ Windows fully supported
- ✅ macOS experimental support
- ✅ Platform-agnostic path handling (XDG spec)
- ✅ Auto-detection of KiCAD installation

### Infrastructure 🏗️
- ✅ GitHub Actions CI/CD pipeline
- ✅ Pytest framework with 20+ tests
- ✅ Pre-commit hooks (Black, MyPy, ESLint)
- ✅ Automated Linux installation script
- ✅ Enhanced npm scripts

### IPC API Migration Prep 🚀
- ✅ Comprehensive migration plan (30 pages)
- ✅ Backend abstraction layer (800+ lines)
- ✅ Factory pattern with auto-detection
- ✅ SWIG backward compatibility wrapper
- ✅ IPC backend skeleton ready

### Documentation 📚
- ✅ Updated README (Linux installation)
- ✅ CONTRIBUTING.md guide
- ✅ Linux compatibility audit
- ✅ IPC API migration plan
- ✅ Session summaries
- ✅ Platform-specific config templates

## Files Changed

- 27 files created
- ~3,000 lines of code/docs
- 8 comprehensive documentation pages
- 20+ unit tests
- 5 abstraction layer modules

## Next Steps

- Week 2: IPC API migration (project.py → component.py → routing.py)
- Migrate from deprecated SWIG to official IPC API
- JLCPCB/Digikey integration prep

🤖 Generated with Claude Code
https://claude.com/claude-code

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

test/manual_test_schematic.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+"""
+Manual test script for the schematic functionality
+"""
+
+import sys
+import os
+
+# Add the parent directory to the module search path
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+
+# Import our schematic modules
+from python.commands.schematic import SchematicManager
+from python.commands.component_schematic import ComponentManager
+from python.commands.connection_schematic import ConnectionManager
+
+def main():
+    """Run a basic test of schematic functionality"""
+    print("=== Starting manual schematic test ===")
+    
+    # Set up test output directory
+    test_dir = os.path.join(os.path.dirname(__file__), 'schematic_test_output')
+    if not os.path.exists(test_dir):
+        os.makedirs(test_dir)
+    
+    # 1. Create a new schematic
+    schematic_name = "TestCircuitManual"
+    schematic_path = os.path.join(test_dir, f"{schematic_name}.kicad_sch")
+    print(f"Creating schematic: {schematic_name}")
+    
+    schematic = SchematicManager.create_schematic(schematic_name)
+    
+    # 2. Add components to the schematic
+    print("Adding components to schematic...")
+    
+    # Add resistor R1
+    r1_def = {
+        "type": "R",
+        "reference": "R1",
+        "value": "10k",
+        "library": "Device",
+        "x": 100,
+        "y": 100
+    }
+    r1 = ComponentManager.add_component(schematic, r1_def)
+    
+    # Add resistor R2
+    r2_def = {
+        "type": "R",
+        "reference": "R2",
+        "value": "4.7k",
+        "library": "Device",
+        "x": 100,
+        "y": 200
+    }
+    r2 = ComponentManager.add_component(schematic, r2_def)
+    
+    # Add capacitor C1
+    c1_def = {
+        "type": "C",
+        "reference": "C1",
+        "value": "0.1uF",
+        "library": "Device",
+        "x": 200,
+        "y": 150
+    }
+    c1 = ComponentManager.add_component(schematic, c1_def)
+    
+    # 3. Add wires to connect components
+    print("Adding wires to connect components...")
+    
+    # Connect R1 to R2
+    wire1 = ConnectionManager.add_wire(schematic, [150, 100], [150, 200])
+    
+    # Connect R2 to C1
+    wire2 = ConnectionManager.add_wire(schematic, [150, 200], [200, 200])
+    
+    # Connect C1 to R1
+    wire3 = ConnectionManager.add_wire(schematic, [200, 100], [150, 100])
+    
+    # 4. Save the schematic
+    print(f"Saving schematic to: {schematic_path}")
+    success = SchematicManager.save_schematic(schematic, schematic_path)
+    
+    if success:
+        print(f"Successfully saved schematic to: {schematic_path}")
+    else:
+        print("Failed to save schematic")
+    
+    print("=== Manual schematic test completed ===")
+
+if __name__ == "__main__":
+    main()