Migrate preview and docs packages from Eleventy to Astro (#2694)

Co-authored-by: Bartek <xbartoszdobija@gmail.com>

preview/pages/map-fullsize.astro

@@ -0,0 +1,41 @@
+---
+// Port of preview/pages/map-fullsize.html.
+// Front matter: layout-wrapper-full + layout-sidebar + layout-hide-topbar,
+// page-libs: [google-maps], page-menu: plugins.map-fullsize. No title / no
+// page-header (the page-header block renders empty in the reference).
+//
+// {% assign map-id = 'google' %} → id="map-google".
+// The {% capture_script %} block is registered synchronously (before any await).
+// We mirror the development build (environment == 'development'), so the
+// `window.tabler_map` bookkeeping lines are emitted (as in the reference).
+//
+// REQUIRES DefaultLayout `wrapperFull` support (see report): page-wrapper-full
+// class + slot rendered WITHOUT the .container-xl wrapper. Not implemented in
+// the shared DefaultLayout yet — flagged rather than modified here.
+import DefaultLayout from '@shared/layouts/DefaultLayout.astro';
+import { addPageScript } from '@shared/lib/page-scripts';
+
+addPageScript(`<script>
+	let map;
+	window.tabler_map = window.tabler_map || {};
+
+	document.addEventListener("DOMContentLoaded", function() {
+		map = new google.maps.Map(document.getElementById("map-google"), {
+			center: { lat: -34.397, lng: 150.644 },
+			zoom: 8,
+		});
+
+		window.tabler_map["map-google"] = map;
+	});
+</script>`);
+---
+
+<DefaultLayout
+	pageMenu="plugins.map-fullsize"
+	pageLibs={['google-maps']}
+	sidebar
+	hideTopbar
+	wrapperFull
+>
+	<div class="map flex-fill" id="map-google"></div>
+</DefaultLayout>