feat: Add PDPA compliance features to Astro website

- Cookie consent banner (Thai language)
- Consent logging with database (@libsql/client, drizzle-orm)
- Preserved all 6 products with specification tables
- Preserved 3 blog posts
- Added dependencies: astro-consent, @libsql/client, drizzle-orm
- Thai-only routing configuration
- Desktop-first typography (18px base)
- Preserved existing design system (green primary color)

Product data preserved in site-config.ts with tables for:
- ท่อ HDPE
- ท่อ PPR ตราช้าง
- ท่อ PP-R/PP-RCT POLOPLAST
- ท่อไซเลอร์
- ท่อระบายน้ำ 3 ชั้น ไซเลนท์
- ท่อพีพีอาร์ไทย

Ready for Easypanel deployment with Nixpacks.

dealplustech-astro/package.json

@@ -9,8 +9,11 @@
     "astro": "astro"
   },
   "dependencies": {
+    "@libsql/client": "^0.17.0",
     "@tailwindcss/vite": "^4.2.1",
     "astro": "^5.17.1",
+    "astro-consent": "^1.0.17",
+    "drizzle-orm": "^0.45.1",
     "tailwindcss": "^4.2.1"
   }
 }