Add marketing page and layout changes

apps/marketing/tailwind.config.ts

@@ -0,0 +1,8 @@
+import { type Config } from "tailwindcss";
+import sharedConfig from "@unsend/tailwind-config/tailwind.config";
+import path from "path";
+
+export default {
+  ...sharedConfig,
+  content: ["./src/**/*.tsx"],
+} satisfies Config;