♻️ 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/actions/runtime/utils.js

@@ -1,16 +0,0 @@
-const ACTION_API_CONTEXT_SYMBOL = Symbol.for("astro.actionAPIContext");
-const formContentTypes = ["application/x-www-form-urlencoded", "multipart/form-data"];
-function hasContentType(contentType, expected) {
-  const type = contentType.split(";")[0].toLowerCase();
-  return expected.some((t) => type === t);
-}
-function isActionAPIContext(ctx) {
-  const symbol = Reflect.get(ctx, ACTION_API_CONTEXT_SYMBOL);
-  return symbol === true;
-}
-export {
-  ACTION_API_CONTEXT_SYMBOL,
-  formContentTypes,
-  hasContentType,
-  isActionAPIContext
-};