feat: Upgrade to Astro with full PDPA compliance

PDPA Features:
✅ Cookie consent banner
✅ Consent logging API
✅ Admin dashboard
✅ Privacy Policy
✅ Terms & Conditions

Technical:
✅ Astro 5.x + Tailwind v4
✅ Docker on port 80
✅ SQLite database
✅ 15 pages built

Ready for Easypanel deployment.

node_modules/astro-consent/dist/config/defaults.js

@@ -0,0 +1,40 @@
+/**
+ * DEFAULT_CONFIG
+ * ---------------------------------------------------------
+ * Fallback values ONLY.
+ *
+ * These are used:
+ * - when the user omits a value
+ * - during internal normalisation
+ *
+ * User-provided config ALWAYS takes priority.
+ */
+export const DEFAULT_CONFIG = {
+    siteName: "This website",
+    policyUrl: "/privacy",
+    consent: {
+        enabled: true,
+        // Number of days consent remains valid
+        days: 30,
+        // Must match runtime + frontend API
+        storageKey: "astro-consent"
+    },
+    categories: {
+        essential: {
+            label: "Essential",
+            description: "Required for the website to function correctly",
+            enabled: true,
+            readonly: true
+        },
+        analytics: {
+            label: "Analytics",
+            description: "Helps us understand how visitors use the site",
+            enabled: false
+        },
+        marketing: {
+            label: "Marketing",
+            description: "Used to deliver personalised ads",
+            enabled: false
+        }
+    }
+};