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>

emdash-env.d.ts

@@ -0,0 +1,24 @@
+// Generated by EmDash on dev server start
+// Do not edit manually
+
+/// <reference types="emdash/locals" />
+
+import type { ContentBylineCredit, PortableTextBlock } from "emdash";
+
+export interface Page {
+	id: string;
+	slug: string | null;
+	status: string;
+	title: string;
+	content?: PortableTextBlock[];
+	createdAt: Date;
+	updatedAt: Date;
+	publishedAt: Date | null;
+	bylines?: ContentBylineCredit[];
+}
+
+declare module "emdash" {
+	interface EmDashCollections {
+		pages: Page;
+	}
+}