feat(skills): add baoyu-infographic skill — 21 layouts × 21 styles

Port of baoyu-infographic from JimLiu/baoyu-skills (v1.56.1) adapted
for Hermes Agent's tool ecosystem.

Adaptations from upstream:
- Frontmatter: openclaw metadata → hermes metadata
- Usage: slash command syntax → natural language triggers
- Removed EXTEND.md config system (not part of Hermes infrastructure)
- AskUserQuestion → clarify tool (one question at a time)
- Image generation → image_generate tool
- Removed Windows-specific paths
- Simplified file operations to use Hermes file tools
- All 45 reference files (layouts, styles, templates) preserved intact

Attribution preserved per agreement with 宝玉 (Jim Liu):
- author, version, GitHub homepage URL in frontmatter

Co-authored-by: Jim Liu 宝玉 <junminliu@gmail.com>

skills/creative/baoyu-infographic/references/styles/technical-schematic.md

@@ -0,0 +1,36 @@
+# technical-schematic
+
+Technical diagrams with engineering precision and clean geometry.
+
+## Color Palette
+
+- Primary: Blues (#2563EB), teals, grays, white lines
+- Background: Deep blue (#1E3A5F), white, or light gray with grid
+- Accents: Amber highlights (#F59E0B), cyan callouts
+
+## Variants
+
+| Variant | Focus | Visual Emphasis |
+|---------|-------|-----------------|
+| **Blueprint** | Engineering schematics | White on blue, measurements, grid |
+| **Isometric** | 3D spatial representation | 30° angle blocks, clean fills |
+
+## Visual Elements
+
+- Geometric precision throughout
+- Grid pattern or isometric angle
+- Dimension lines and measurements
+- Technical symbols and annotations
+- Clean vector shapes
+- Consistent stroke weights
+
+## Typography
+
+- Technical stencil or clean sans-serif
+- All-caps labels
+- Measurement annotations
+- Floating labels for isometric
+
+## Best For
+
+Technical architecture, system diagrams, engineering specs, product breakdowns, data visualization