♻️ 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/prismjs/components/prism-phpdoc.min.js

@@ -1 +0,0 @@
-!function(a){var e="(?:\\b[a-zA-Z]\\w*|[|\\\\[\\]])+";a.languages.phpdoc=a.languages.extend("javadoclike",{parameter:{pattern:RegExp("(@(?:global|param|property(?:-read|-write)?|var)\\s+(?:"+e+"\\s+)?)\\$\\w+"),lookbehind:!0}}),a.languages.insertBefore("phpdoc","keyword",{"class-name":[{pattern:RegExp("(@(?:global|package|param|property(?:-read|-write)?|return|subpackage|throws|var)\\s+)"+e),lookbehind:!0,inside:{keyword:/\b(?:array|bool|boolean|callback|double|false|float|int|integer|mixed|null|object|resource|self|string|true|void)\b/,punctuation:/[|\\[\]()]/}}]}),a.languages.javadoclike.addSupport("php",a.languages.phpdoc)}(Prism);