feat(baoyu-image-cards): add image card series skill migrated from baoyu-xhs-images

Rename baoyu-xhs-images to baoyu-image-cards to decouple from Xiaohongshu platform.
Deprecate baoyu-xhs-images with migration notice pointing to baoyu-image-cards.

skills/baoyu-image-cards/references/presets/bold.md

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+---
+name: bold
+category: impact
+---
+
+# Bold Style
+
+High impact, attention-grabbing aesthetic.
+
+## Element Combination
+
+```yaml
+canvas:
+  ratio: portrait-3-4
+  grid: single | dual
+
+image_effects:
+  cutout: clean
+  stroke: colored-solid | double
+  filter: high-saturation
+
+typography:
+  decorated: shadow-3d | stroke-text
+  tags: black-white | ribbon
+  direction: horizontal | diagonal
+
+decorations:
+  emphasis: exclamation | star-burst | red-arrow
+  background: solid-saturated | gradient-linear
+  doodles: arrows-curvy | squiggles
+  frames: none
+```
+
+## Color Palette
+
+| Role | Colors | Hex |
+|------|--------|-----|
+| Primary | Vibrant red, orange, yellow | #E53E3E, #DD6B20, #F6E05E |
+| Background | Deep black, dark charcoal | #000000, #1A1A1A |
+| Accents | White, neon yellow | #FFFFFF, #F7FF00 |
+
+## Visual Elements
+
+- Exclamation marks, arrows, warning icons
+- Strong shapes, high contrast elements
+- Dramatic compositions
+- Bold geometric forms
+
+## Typography
+
+- Bold, impactful hand lettering with shadows
+- High contrast text treatments
+- Large, commanding headlines
+
+## Best Layout Pairings
+
+| Layout | Compatibility | Use Case |
+|--------|---------------|----------|
+| sparse | ✓✓ | Impactful statements |
+| balanced | ✓ | Warning content |
+| dense | ✓ | Critical information cards |
+| list | ✓✓ | Must-know lists, rankings |
+| comparison | ✓✓ | Dramatic contrasts |
+| flow | ✓ | Critical process steps |
+
+## Best For
+
+- Important tips and warnings
+- Must-know content
+- Critical announcements
+- Rankings and comparisons
+- Attention-grabbing hooks