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/prismjs/plugins/show-invisibles/prism-show-invisibles.css

@@ -0,0 +1,34 @@
+.token.tab:not(:empty),
+.token.cr,
+.token.lf,
+.token.space {
+	position: relative;
+}
+
+.token.tab:not(:empty):before,
+.token.cr:before,
+.token.lf:before,
+.token.space:before {
+	color: #808080;
+	opacity: 0.6;
+	position: absolute;
+}
+
+.token.tab:not(:empty):before {
+	content: '\21E5';
+}
+
+.token.cr:before {
+	content: '\240D';
+}
+
+.token.crlf:before {
+	content: '\240D\240A';
+}
+.token.lf:before {
+	content: '\240A';
+}
+
+.token.space:before {
+	content: '\00B7';
+}