Update skills: add website-creator, mql-developer, ecommerce-astro

Changes:
- Add FAL_KEY and GEMINI_API_KEY to .env.example
- Update picture-it to use ~/.config/opencode/.env (unified creds)
- Remove shodh-memory skill (no longer used)
- Remove alphaear-* skills (deprecated)
- Remove thai-frontend-dev skill (replaced by website-creator)
- Remove theme-factory skill
- Add mql-developer skill (MQL5 trading)
- Add ecommerce-astro skill (Astro e-commerce)
- Add website-creator skill (Next.js + Payload CMS)
- Update install script for new skills

skills/website-creator/seo-multi-channel/SKILL.md

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+---
+name: seo-multi-channel
+description: Generate multi-channel marketing content (Facebook, Facebook Ads, Google Ads, Blog, X) from a single topic with Thai language support. Use when creating content for multiple channels.
+---
+
+# SEO Multi-Channel Content Generator
+
+Generate marketing content for multiple channels from one topic — Facebook, Facebook Ads, Google Ads, Blog, X/Twitter.
+
+## Priority Channels
+
+1. Facebook (organic)
+2. Facebook Ads
+3. Google Ads
+4. Blog (SEO articles)
+5. X/Twitter threads
+
+## Usage
+
+```bash
+python3 ~/.hermes/skills/seo-multi-channel/scripts/generate_content.py \
+  --topic "บริการ podcast hosting" \
+  --channels facebook,blog \
+  --language th
+```
+
+## Parameters
+
+| Parameter | Required | Default | Description |
+|-----------|----------|---------|-------------|
+| `--topic` | ✅ | - | Content topic |
+| `--channels` | ❌ | all | Comma-separated channel list |
+| `--language` | ❌ | auto | th/en/auto |
+| `--output` | ❌ | ./output | Output directory |
+
+## Channels
+
+### Facebook
+- Organic posts for community engagement
+- Length: 50-500 characters
+- Include CTA when relevant
+
+### Facebook Ads
+- Ad copy with headline + description
+- Multiple variations (A/B testing ready)
+
+### Google Ads
+- Search ad copy (headline + description)
+- Keyword-optimized
+
+### Blog
+- SEO article with title, meta, content
+- Structured for Thai readability (ม.6-ม.12)
+
+### X/Twitter
+- Thread format (5-10 tweets)
+- Engagement-optimized
+
+## Thai Language Support
+
+- Full PyThaiNLP integration
+- Keyword density 1.0-1.5%
+- Formality detection
+- Readability scoring
+
+## Integration
+
+Uses `seo-context` for per-project brand voice and keyword context.