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/layouts/story-mountain.md

@@ -0,0 +1,41 @@
+# story-mountain
+
+Plot structure visualization showing rising action, climax, and resolution.
+
+## Structure
+
+- Mountain/arc shape
+- Rising slope (build-up)
+- Peak (climax)
+- Falling slope (resolution)
+- Start and end at base level
+
+## Best For
+
+- Narrative structures
+- Project lifecycles
+- Tension/release patterns
+- Emotional journeys
+- Campaign arcs
+
+## Visual Elements
+
+- Mountain or arc curve
+- Points along the path
+- Climax visually emphasized
+- Slope steepness meaningful
+- Base camps or milestones
+
+## Text Placement
+
+- Title at top
+- Stage labels along path
+- Climax prominently labeled
+- Brief descriptions at points
+- Start/end clearly marked
+
+## Recommended Pairings
+
+- `storybook-watercolor`: Narrative journeys
+- `cartoon-hand-drawn`: Educational plot diagrams
+- `graphic-novel`: Dramatic story arcs