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/warm.md

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+---
+name: warm
+category: cozy
+---
+
+# Warm Style
+
+Cozy, friendly, approachable aesthetic.
+
+## Element Combination
+
+```yaml
+canvas:
+  ratio: portrait-3-4
+  grid: single | dual
+
+image_effects:
+  cutout: soft
+  stroke: white-solid | glow
+  filter: warm-tone | cream-skin
+
+typography:
+  decorated: highlight | handwritten
+  tags: ribbon | bubble
+  direction: horizontal
+
+decorations:
+  emphasis: star-burst | hearts
+  background: solid-pastel | gradient-radial
+  doodles: clouds | stars-sparkles
+  frames: polaroid | tape-corners
+```
+
+## Color Palette
+
+| Role | Colors | Hex |
+|------|--------|-----|
+| Primary | Warm orange, golden yellow, terracotta | #ED8936, #F6AD55, #C05621 |
+| Background | Cream, soft peach | #FFFAF0, #FED7AA |
+| Accents | Deep brown, soft red | #744210, #E57373 |
+
+## Visual Elements
+
+- Sun rays, coffee cups, cozy items
+- Warm lighting effects
+- Friendly, inviting decorations
+- Soft, comfortable shapes
+
+## Typography
+
+- Friendly, rounded hand lettering
+- Warm color accents
+- Comfortable, approachable feel
+
+## Best Layout Pairings
+
+| Layout | Compatibility | Use Case |
+|--------|---------------|----------|
+| sparse | ✓✓ | Emotional covers |
+| balanced | ✓✓ | Personal stories |
+| dense | ✓ | Detailed experiences |
+| list | ✓ | Life lessons |
+| comparison | ✓✓ | Before/after stories |
+| flow | ✓ | Journey narratives |
+
+## Best For
+
+- Personal stories
+- Life lessons
+- Emotional content
+- Comfort and lifestyle
+- Heartfelt shares