Refine repository structure for KiCad 9 optimization

- Add dedicated /kicad/ directory with organized subdirectories for libraries, schematics, gerbers, plots, and backups
- Create comprehensive KiCad 9 library structure (symbols, footprints, 3D models)
- Add manufacturing-ready directories for production files (gerbers, drill, pick-and-place)
- Update all README files with KiCad-specific documentation and workflows
- Add KiCad-optimized .gitignore file for proper version control
- Create KICAD-PROJECT-TEMPLATE.md comprehensive usage guide
- Add hardware assembly documentation and BOM management
- Include detailed manufacturing file generation instructions
- Add docs structure with design-notes and user-manual directories
- Provide complete workflow from design to manufacturing with quality checklists

docs/README.md

@@ -1,3 +1,33 @@
 # /docs
 
-Documentation files for users and developers.
+Project documentation for your KiCad project.
+
+## Purpose
+This directory contains all project documentation including user manuals, design notes, images, and reference materials.
+
+## Directory Structure
+- `images/` - Documentation images, photos, and diagrams
+- `datasheets/` - Component datasheets and specifications
+- `user-manual/` - End-user documentation and guides
+- `design-notes/` - Design decisions and technical documentation
+
+## Documentation Types
+- **User Manual**: How to use the finished product
+- **Design Notes**: Technical decisions and rationale
+- **Assembly Guide**: How to build the project
+- **Testing Procedures**: Verification and validation
+- **Troubleshooting**: Common issues and solutions
+
+## Best Practices
+- Use clear, descriptive filenames
+- Include version information in documents
+- Keep images organized and properly referenced
+- Document design decisions and trade-offs
+- Update documentation with design changes
+- Use consistent formatting and style
+
+## File Formats
+- **Markdown (`.md`)**: Preferred for text documentation
+- **PDF (`.pdf`)**: For formal documents and printable guides
+- **Images**: PNG for diagrams, JPG for photos
+- **Datasheets**: PDF format from manufacturers