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/creative/picture-it/references/pipeline-templates.json

@@ -0,0 +1,49 @@
+{
+  "blog-hero": {
+    "description": "Dark cinematic blog hero with logo overlay",
+    "estimated_cost": "$0.043",
+    "pipeline": [
+      { "op": "generate", "prompt": "<scene_description>", "size": "1200x630" },
+      { "op": "edit", "prompt": "place Figure 1 as a large glowing element in center", "assets": ["logo.png"] },
+      { "op": "grade", "name": "cinematic" },
+      { "op": "vignette" }
+    ]
+  },
+  "product-comparison": {
+    "description": "Side-by-side product comparison with remove-bg",
+    "estimated_cost": "$0.01",
+    "pipeline": [
+      { "op": "generate", "prompt": "clean gradient backdrop, professional lighting", "size": "1200x630" },
+      { "op": "remove-bg", "assets": ["product-a.png"] },
+      { "op": "compose", "overlays": "comparison-layout.json" },
+      { "op": "grade", "name": "clean" }
+    ]
+  },
+  "youtube-thumbnail": {
+    "description": "Bold text-behind-subject YouTube thumbnail",
+    "estimated_cost": "$0.07",
+    "pipeline": [
+      { "op": "generate", "prompt": "<scene>", "size": "1280x720" },
+      { "op": "edit", "prompt": "place text '<title>' behind the subject, keep subject fully visible", "assets": [] },
+      { "op": "grade", "name": "cinematic" },
+      { "op": "vignette" }
+    ]
+  },
+  "instagram-square": {
+    "description": "Clean Instagram square post",
+    "estimated_cost": "$0.003-0.15",
+    "pipeline": [
+      { "op": "generate", "prompt": "<prompt>", "size": "1080x1080" },
+      { "op": "grade", "name": "vibrant" }
+    ]
+  },
+  "social-card": {
+    "description": "Text overlay on generated background",
+    "estimated_cost": "$0.003",
+    "pipeline": [
+      { "op": "generate", "prompt": "<background_prompt>", "size": "1200x630" },
+      { "op": "text", "title": "<title>", "fontSize": 64, "font": "Space Grotesk" },
+      { "op": "grade", "name": "cinematic" }
+    ]
+  }
+}