feat: improve logo symbols with unified stackable design

- Make all symbol boxes same size (12.7mm x 5.08mm) for perfect stacking
- Separate symbol graphics from text for better control
- Widen footprint silkscreen boxes to prevent text clipping
- Eduard Iten, Created By, and CC logos now perfectly stackable
- All logos maintain proper exclude_from_bom settings

artwork/logos/README.md

@@ -0,0 +1,19 @@
+# SVG Artwork for Logos
+
+Place your original SVG logo files here:
+
+## Eduard Iten Logo
+- `eduard_iten_logo.svg` - Original logo in high resolution
+
+## Logo Guidelines
+- **Format**: SVG (vector format)
+- **Colors**: Monochrome for silkscreen (black on transparent)
+- **Text**: Convert to paths/outlines
+- **Size**: High resolution, will be scaled in KiCad
+- **Line width**: Minimum 0.1mm for manufacturing
+
+## Usage
+1. Import SVG into KiCad footprint editor
+2. Place on F.SilkS or B.SilkS layer  
+3. Adjust scale to match footprint size (2mm, 3mm, 5mm)
+4. Ensure minimum line widths for manufacturing