♻️ 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-abnf.min.js

@@ -1 +0,0 @@
-!function(n){var i="(?:ALPHA|BIT|CHAR|CR|CRLF|CTL|DIGIT|DQUOTE|HEXDIG|HTAB|LF|LWSP|OCTET|SP|VCHAR|WSP)";n.languages.abnf={comment:/;.*/,string:{pattern:/(?:%[is])?"[^"\n\r]*"/,greedy:!0,inside:{punctuation:/^%[is]/}},range:{pattern:/%(?:b[01]+-[01]+|d\d+-\d+|x[A-F\d]+-[A-F\d]+)/i,alias:"number"},terminal:{pattern:/%(?:b[01]+(?:\.[01]+)*|d\d+(?:\.\d+)*|x[A-F\d]+(?:\.[A-F\d]+)*)/i,alias:"number"},repetition:{pattern:/(^|[^\w-])(?:\d*\*\d*|\d+)/,lookbehind:!0,alias:"operator"},definition:{pattern:/(^[ \t]*)(?:[a-z][\w-]*|<[^<>\r\n]*>)(?=\s*=)/m,lookbehind:!0,alias:"keyword",inside:{punctuation:/<|>/}},"core-rule":{pattern:RegExp("(?:(^|[^<\\w-])"+i+"|<"+i+">)(?![\\w-])","i"),lookbehind:!0,alias:["rule","constant"],inside:{punctuation:/<|>/}},rule:{pattern:/(^|[^<\w-])[a-z][\w-]*|<[^<>\r\n]*>/i,lookbehind:!0,inside:{punctuation:/<|>/}},operator:/=\/?|\//,punctuation:/[()\[\]]/}}(Prism);