chore(site): scaffold astro project, remove legacy SPA

site/astro.config.mjs

@@ -0,0 +1,15 @@
+// @ts-check
+import { defineConfig } from "astro/config";
+import tailwindcss from "@tailwindcss/vite";
+import sitemap from "@astrojs/sitemap";
+
+export default defineConfig({
+  site: "https://termscp.rs",
+  i18n: {
+    defaultLocale: "en",
+    locales: ["en", "zh-CN", "it", "fr", "es"],
+    routing: { prefixDefaultLocale: false },
+  },
+  integrations: [sitemap()],
+  vite: { plugins: [tailwindcss()] },
+});