♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
✅ Cookie consent banner included
✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/vite-plugin-astro/utils.js

@@ -1,20 +0,0 @@
-import fs from "node:fs/promises";
-const frontmatterRE = /^---(.*?)^---/ms;
-async function loadId(pluginContainer, id) {
-  const result = await pluginContainer.load(id, { ssr: true });
-  if (result) {
-    if (typeof result === "string") {
-      return result;
-    } else {
-      return result.code;
-    }
-  }
-  try {
-    return await fs.readFile(id, "utf-8");
-  } catch {
-  }
-}
-export {
-  frontmatterRE,
-  loadId
-};