♻️ 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-actionscript.min.js

@@ -1 +0,0 @@
-Prism.languages.actionscript=Prism.languages.extend("javascript",{keyword:/\b(?:as|break|case|catch|class|const|default|delete|do|dynamic|each|else|extends|final|finally|for|function|get|if|implements|import|in|include|instanceof|interface|internal|is|namespace|native|new|null|override|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|use|var|void|while|with)\b/,operator:/\+\+|--|(?:[+\-*\/%^]|&&?|\|\|?|<<?|>>?>?|[!=]=?)=?|[~?@]/}),Prism.languages.actionscript["class-name"].alias="function",delete Prism.languages.actionscript.parameter,delete Prism.languages.actionscript["literal-property"],Prism.languages.markup&&Prism.languages.insertBefore("actionscript","string",{xml:{pattern:/(^|[^.])<\/?\w+(?:\s+[^\s>\/=]+=("|')(?:\\[\s\S]|(?!\2)[^\\])*\2)*\s*\/?>/,lookbehind:!0,inside:Prism.languages.markup}});