♻️ 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/@shikijs/engine-javascript/dist/engine-raw.mjs

@@ -1,22 +0,0 @@
-import { J as JavaScriptScanner } from './shared/engine-javascript.hzpS1_41.mjs';
-
-function createJavaScriptRawEngine() {
-  const options = {
-    cache: /* @__PURE__ */ new Map(),
-    regexConstructor: () => {
-      throw new Error("JavaScriptRawEngine: only support precompiled grammar");
-    }
-  };
-  return {
-    createScanner(patterns) {
-      return new JavaScriptScanner(patterns, options);
-    },
-    createString(s) {
-      return {
-        content: s
-      };
-    }
-  };
-}
-
-export { createJavaScriptRawEngine };