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

@@ -1 +0,0 @@
-Prism.languages.bbcode={tag:{pattern:/\[\/?[^\s=\]]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+))?(?:\s+[^\s=\]]+\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+))*\s*\]/,inside:{tag:{pattern:/^\[\/?[^\s=\]]+/,inside:{punctuation:/^\[\/?/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'"\]=]+)/,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\]/,"attr-name":/[^\s=\]]+/}}},Prism.languages.shortcode=Prism.languages.bbcode;