♻️ 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-pcaxis.min.js

@@ -1 +0,0 @@
-Prism.languages.pcaxis={string:/"[^"]*"/,keyword:{pattern:/((?:^|;)\s*)[-A-Z\d]+(?:\s*\[[-\w]+\])?(?:\s*\("[^"]*"(?:,\s*"[^"]*")*\))?(?=\s*=)/,lookbehind:!0,greedy:!0,inside:{keyword:/^[-A-Z\d]+/,language:{pattern:/^(\s*)\[[-\w]+\]/,lookbehind:!0,inside:{punctuation:/^\[|\]$/,property:/[-\w]+/}},"sub-key":{pattern:/^(\s*)\S[\s\S]*/,lookbehind:!0,inside:{parameter:{pattern:/"[^"]*"/,alias:"property"},punctuation:/^\(|\)$|,/}}}},operator:/=/,tlist:{pattern:/TLIST\s*\(\s*\w+(?:(?:\s*,\s*"[^"]*")+|\s*,\s*"[^"]*"-"[^"]*")?\s*\)/,greedy:!0,inside:{function:/^TLIST/,property:{pattern:/^(\s*\(\s*)\w+/,lookbehind:!0},string:/"[^"]*"/,punctuation:/[(),]/,operator:/-/}},punctuation:/[;,]/,number:{pattern:/(^|\s)\d+(?:\.\d+)?(?!\S)/,lookbehind:!0},boolean:/NO|YES/},Prism.languages.px=Prism.languages.pcaxis;