♻️ 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
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✅ 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/sharp/lib/index.js

@@ -1,16 +0,0 @@
-/*!
-  Copyright 2013 Lovell Fuller and others.
-  SPDX-License-Identifier: Apache-2.0
-*/
-
-const Sharp = require('./constructor');
-require('./input')(Sharp);
-require('./resize')(Sharp);
-require('./composite')(Sharp);
-require('./operation')(Sharp);
-require('./colour')(Sharp);
-require('./channel')(Sharp);
-require('./output')(Sharp);
-require('./utility')(Sharp);
-
-module.exports = Sharp;