feat: implement JLCPCB Basic Parts system with Fabrication Toolkit support

- Replace custom footprints approach with standard KiCad footprints
- Add comprehensive JLCPCB Basic Parts database with real part numbers
- Create dual-platform symbol generators (PowerShell + Bash)
- Support bennymeg/JLC-Plugin-for-KiCad with proper field names
- Include standard ICs (STM32, CAN, power, interface)
- Generate BOM templates for JLCPCB assembly
- Add German (.de.md) and English (.md) documentation versions
- Remove old LCSC-only approach in favor of complete JLCPCB solution

Breaking changes:
- Removed custom footprints for standard passives
- Updated naming conventions for JLCPCB compatibility
- Replaced LCSC_Parts_Database.csv with JLCPCB_Basic_Parts.csv

README.md

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+# My Personal KiCad Library
+
+This library contains custom KiCad components that are not available in the standard library.
+
+## 📁 Structure
+
+```
+my-kicad-libs/
+├── symbols/              # Symbol libraries (.kicad_sym)
+│   ├── Custom_Logic/
+│   ├── Custom_Power/
+│   ├── Custom_Connectors/
+│   ├── Standard_Passives/    # Standard R/C/L with LCSC
+│   ├── Standard_ICs/         # CAN, STM32, Standard ICs
+│   ├── Logos_Artwork/
+│   └── ...
+├── footprints/           # Footprint libraries (.pretty)
+│   ├── Custom_QFN.pretty/
+│   ├── Custom_BGA.pretty/
+│   ├── Logos_Silkscreen.pretty/
+│   └── ...    # Only custom footprints, standard uses KiCad libs
+├── 3d_models/           # 3D models (.step, .wrl)
+│   ├── Connectors/
+│   ├── IC_Packages/
+│   ├── Mechanical/
+│   └── ...
+├── datasheets/          # Datasheets (optional)
+├── docs/                # Documentation
+├── scripts/             # Automation scripts
+└── templates/           # Project templates
+```
+
+## 🏷️ Naming Conventions
+
+### Symbols (.kicad_sym files)
+- **Format**: `[Category]_[Manufacturer]_[Series].kicad_sym`
+- **Examples**:
+  - `Logic_TI_74HC.kicad_sym`
+  - `Power_LTC_Switching.kicad_sym`
+  - `Connectors_JST_XH.kicad_sym`
+  - `Standard_Passives.kicad_sym`
+  - `Standard_ICs.kicad_sym`
+  - `Logos_Personal.kicad_sym`
+
+### Individual Symbol Names (within .kicad_sym)
+- **Format**: `[Partnumber]_[Package]_[Variant]`
+- **Format (Standard Passives)**: `[Value]_[Package]_[LCSC]`
+- **Format (Standard ICs)**: `[Partnumber]_[Package]_[LCSC]`
+- **Examples**:
+  - `TPS54340_HTSSOP-14_PowerPAD`
+  - `STM32F407VGT6_LQFP-100`
+  - `USB-C_16Pin_Receptacle`
+  - `100nF_0603_C14663` (Capacitor with LCSC#)
+  - `10k_0603_C25804` (Resistor with LCSC#)
+  - `MCP2515_SOIC-18_C55199` (CAN controller with LCSC#)
+  - `Logo_MyCompany_10mm`
+
+### Footprints (.pretty folders)
+**Note**: Standard passives and common ICs use existing KiCad footprints!
+
+- **Format**: `[Category]_[Specification].pretty`
+- **Examples**:
+  - `QFN_Custom.pretty`
+  - `USB_Connectors.pretty`
+  - `Logos_Silkscreen.pretty`
+  - `Mechanical_Standoffs.pretty`
+
+## 📊 Standard Components with LCSC
+
+### Standard Passives (R/C/L)
+- **Purpose**: Consistent, cost-optimized parts with LCSC numbers
+- **Footprints**: Use standard KiCad footprints (Resistor_SMD, Capacitor_SMD, etc.)
+- **Symbols**: Custom symbols with LCSC part numbers and manufacturer data
+- **Examples**: `100nF_0603_C14663`, `10k_0603_C25804`
+
+### Standard ICs
+- **Purpose**: Common ICs with LCSC numbers for automated assembly
+- **Categories**:
+  - CAN transceivers: `MCP2515_SOIC-18_C55199`
+  - STM32 MCUs: `STM32F103C8T6_LQFP-48_C8734`
+  - Voltage regulators: `AMS1117-3.3_SOT-223_C6186`
+  - Op-amps: `LM358_SOIC-8_C7950`
+- **Footprints**: Use standard KiCad footprints (Package_SO, Package_QFP, etc.)
+
+## ⚙️ Best Practices
+
+### Standard Component Strategy
+1. **Use KiCad footprints**: Don't reinvent the wheel for standard packages
+2. **LCSC integration**: Add LCSC numbers for cost optimization
+3. **Manufacturer data**: Include MPN and manufacturer in symbols
+4. **BOM automation**: Enable direct JLCPCB assembly integration
+
+### Workflow
+
+#### Adding New Standard Component
+1. **Check KiCad**: Verify symbol/footprint don't exist in standard libraries
+2. **LCSC lookup**: Find LCSC part number and basic part status
+3. **Create symbol**: With complete manufacturer data and LCSC number
+4. **Link footprint**: Use existing KiCad footprint
+5. **Test**: Use in test circuit
+6. **Document**: Add to documentation
+
+---
+
+*Last update: December 9, 2024*