Add sub-skills from ui-ux-pro-max-skill repo

Added:
- banner-design (new)
- brand (new)
- design-system (new)
- slides (new)
- ui-ux-pro-max data/scripts (from GitHub clone)
- ui-styling data/scripts (from GitHub clone)

skills/website-creator/brand/references/update.md

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+Update brand colors, typography, and style - automatically syncs to all design system files.
+
+<args>$ARGUMENTS</args>
+
+## Overview
+
+This command systematically updates:
+1. `docs/brand-guidelines.md` - Human-readable brand doc
+2. `assets/design-tokens.json` - Token source of truth
+3. `assets/design-tokens.css` - Generated CSS variables
+
+## Workflow
+
+### Step 1: Gather Brand Input
+
+Use `AskUserQuestion` to collect:
+
+**Theme Selection:**
+- Theme name (e.g., "Ocean Professional", "Electric Creative", "Forest Calm")
+
+**Primary Color:**
+- Color name (e.g., "Ocean Blue", "Coral", "Forest Green")
+- Hex code (e.g., #3B82F6)
+
+**Secondary Color:**
+- Color name (e.g., "Golden Amber", "Electric Purple")
+- Hex code
+
+**Accent Color:**
+- Color name (e.g., "Emerald", "Neon Mint")
+- Hex code
+
+**Brand Mood (for AI image generation):**
+- Mood keywords (e.g., "professional, trustworthy, premium" or "bold, creative, energetic")
+
+### Step 2: Update Brand Guidelines
+
+Edit `docs/brand-guidelines.md`:
+
+1. **Quick Reference table** - Update color names and hex codes
+2. **Brand Concept section** - Update theme name and description
+3. **Color Palette section** - Update Primary, Secondary, Accent colors with shades
+4. **AI Image Generation section** - Update base prompt, keywords, mood descriptors
+
+### Step 3: Sync to Design Tokens
+
+Run the sync script:
+```bash
+node .claude/skills/brand/scripts/sync-brand-to-tokens.cjs
+```
+
+This will:
+- Update `assets/design-tokens.json` with new color names and values
+- Regenerate `assets/design-tokens.css` with correct CSS variables
+
+### Step 4: Verify Sync
+
+Confirm all files are updated:
+```bash
+# Check brand context extraction
+node .claude/skills/brand/scripts/inject-brand-context.cjs --json | head -30
+
+# Check CSS variables
+grep "primary" assets/design-tokens.css | head -5
+```
+
+### Step 5: Report
+
+Output summary:
+- Theme: [name]
+- Primary: [name] ([hex])
+- Secondary: [name] ([hex])
+- Accent: [name] ([hex])
+- Files updated: brand-guidelines.md, design-tokens.json, design-tokens.css
+
+## Files Modified
+
+| File | Purpose |
+|------|---------|
+| `docs/brand-guidelines.md` | Human-readable brand documentation |
+| `assets/design-tokens.json` | Token definitions (primitive→semantic→component) |
+| `assets/design-tokens.css` | CSS variables for UI components |
+
+## Skills Used
+
+- `brand` - Brand context extraction and sync
+- `design-system` - Token generation
+
+## Examples
+
+```bash
+# Interactive mode
+/brand:update
+
+# With theme hint
+/brand:update "Ocean Professional"
+
+# Quick preset
+/brand:update "midnight purple"
+```
+
+## Color Presets
+
+If user specifies a preset name, use these defaults:
+
+| Preset | Primary | Secondary | Accent |
+|--------|---------|-----------|--------|
+| ocean-professional | #3B82F6 Ocean Blue | #F59E0B Golden Amber | #10B981 Emerald |
+| electric-creative | #FF6B6B Coral | #9B5DE5 Electric Purple | #00F5D4 Neon Mint |
+| forest-calm | #059669 Forest Green | #92400E Warm Brown | #FBBF24 Sunlight |
+| midnight-purple | #7C3AED Violet | #EC4899 Pink | #06B6D4 Cyan |
+| sunset-warm | #F97316 Orange | #DC2626 Red | #FACC15 Yellow |
+
+## Important
+
+- **Always sync all three files** - Never update just brand-guidelines.md alone
+- **Verify extraction** - Run inject-brand-context.cjs after update to confirm
+- **Test image generation** - Optionally generate a test image to verify brand application