♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

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

dealplustech-astro/node_modules/detect-libc/lib/process.js

@@ -1,24 +0,0 @@
-// Copyright 2017 Lovell Fuller and others.
-// SPDX-License-Identifier: Apache-2.0
-
-'use strict';
-
-const isLinux = () => process.platform === 'linux';
-
-let report = null;
-const getReport = () => {
-  if (!report) {
-    /* istanbul ignore next */
-    if (isLinux() && process.report) {
-      const orig = process.report.excludeNetwork;
-      process.report.excludeNetwork = true;
-      report = process.report.getReport();
-      process.report.excludeNetwork = orig;
-    } else {
-      report = {};
-    }
-  }
-  return report;
-};
-
-module.exports = { isLinux, getReport };