feat: update website-creator to static mode with ConsentOS + tracking scripts

- Remove Astro DB (no longer needed for consent logging)
- Change from SSR to static output mode
- Add TrackingScripts.astro with GA4, GTM, Umami, Clarity, FB Pixel, Google Ads, TikTok, LINE
- Use ConsentOS consent-loader.js for auto-blocking tracking scripts
- Update Dockerfile to nginx static hosting
- Remove old consent template (custom consent no longer needed)
- Update SKILL.md, AGENTS.md, README.md documentation
- Add nginx.conf for static hosting

skills/website-creator/templates/astro-tina-starter/nginx.conf

@@ -0,0 +1,14 @@
+server {
+    listen 80;
+    root /app/dist;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ $uri.html =404;
+    }
+
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}