Add TTRPG Player marketing landing site.

React/Vite landing with RU/EN i18n, live USD pricing, download links to updates.mailib.ru, and donate.stream checkout.

Co-authored-by: Cursor <cursoragent@cursor.com>

vite.config.ts

@@ -0,0 +1,10 @@
+import react from "@vitejs/plugin-react";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [react()],
+  build: {
+    outDir: "dist",
+    sourcemap: true,
+  },
+});