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/ecommerce-astro/scripts/templates/src/pages/cart.astro

@@ -0,0 +1,52 @@
+---
+import Layout from '../layouts/Layout.astro';
+import Header from '../components/layout/Header';
+import Footer from '../components/layout/Footer';
+import CartItems from '../components/cart/CartItems';
+import CartSummary from '../components/cart/CartSummary';
+import CartDrawer from '../components/cart/CartDrawer';
+import CartBadge from '../components/cart/CartBadge';
+---
+
+<Layout title="ตะกร้าสินค้า">
+  <Header />
+  
+  <div class="container mx-auto px-4 py-8">
+    <h1 class="text-2xl font-bold mb-8">ตะกร้าสินค้า</h1>
+    
+    <div class="grid lg:grid-cols-3 gap-8">
+      <!-- Cart Items -->
+      <div class="lg:col-span-2">
+        <div class="bg-white rounded-xl shadow-sm">
+          <CartItems client:load />
+        </div>
+      </div>
+      
+      <!-- Summary -->
+      <div>
+        <div class="bg-white rounded-xl shadow-sm p-6 sticky top-24">
+          <h2 class="font-bold text-lg mb-4">สรุปคำสั่งซื้อ</h2>
+          <CartSummary client:load />
+          
+          <a 
+            href="/checkout" 
+            class="mt-6 w-full bg-blue-600 text-white py-3 px-4 rounded-lg text-center block hover:bg-blue-700 transition-colors font-medium"
+          >
+            ดำเนินการชำระเงิน
+          </a>
+          
+          <a 
+            href="/products" 
+            class="mt-3 w-full border border-gray-300 py-3 px-4 rounded-lg text-center block hover:bg-gray-50 transition-colors text-gray-700"
+          >
+            เลือกซื้อสินค้าเพิ่มเติม
+          </a>
+        </div>
+      </div>
+    </div>
+  </div>
+  
+  <Footer />
+  <CartDrawer client:load />
+  <CartBadge client:load />
+</Layout>