feat: add official EmDash marketing template

- Marketing landing page with hero, features, testimonials, FAQ, pricing
- EmDash CMS with pages collection and marketing blocks
- Full seed data with all content sections
- Dockerfile with entrypoint for database persistence
- Responsive design with CSS variables

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

astro.config.mjs

@@ -0,0 +1,57 @@
+import node from "@astrojs/node";
+import react from "@astrojs/react";
+import icon from "astro-iconset";
+import { defineConfig, fontProviders } from "astro/config";
+import emdash, { local } from "emdash/astro";
+import { sqlite } from "emdash/db";
+
+export default defineConfig({
+	output: "server",
+	adapter: node({ mode: "standalone" }),
+	image: {
+		layout: "constrained",
+		responsiveStyles: true,
+	},
+	integrations: [
+		react(),
+		icon({
+			include: {
+				ph: [
+					"chart-bar",
+					"check-circle",
+					"clock",
+					"cloud",
+					"code",
+					"currency-dollar",
+					"envelope",
+					"globe",
+					"heart",
+					"lifebuoy",
+					"lightning",
+					"lock",
+					"shield-check",
+					"sparkle",
+					"star",
+					"users-three",
+				],
+			},
+		}),
+		emdash({
+			database: sqlite({ url: "file:./data.db" }),
+			storage: local({
+				directory: "./uploads",
+				baseUrl: "/_emdash/api/media/file",
+			}),
+		}),
+	],
+	fonts: [
+		{
+			provider: fontProviders.google(),
+			name: "Inter",
+			cssVariable: "--font-sans",
+			weights: [400, 500, 600, 700, 800],
+			fallbacks: ["sans-serif"],
+		},
+	],
+	devToolbar: { enabled: false },
+});