feat: 新增 account 和 plan 目录

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

account/admin/skills/theme-factory/themes/botanical-garden.md

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+# Botanical Garden
+
+A fresh and organic theme featuring vibrant garden-inspired colors for lively presentations.
+
+## Color Palette
+
+- **Fern Green**: `#4a7c59` - Rich natural green
+- **Marigold**: `#f9a620` - Bright floral accent
+- **Terracotta**: `#b7472a` - Earthy warm tone
+- **Cream**: `#f5f3ed` - Soft neutral backgrounds
+
+## Typography
+
+- **Headers**: DejaVu Serif Bold
+- **Body Text**: DejaVu Sans
+
+## Best Used For
+
+Garden centers, food presentations, farm-to-table content, botanical brands, natural products.