♻️ 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-tcl.min.js

@@ -1 +0,0 @@
-Prism.languages.tcl={comment:{pattern:/(^|[^\\])#.*/,lookbehind:!0},string:{pattern:/"(?:[^"\\\r\n]|\\(?:\r\n|[\s\S]))*"/,greedy:!0},variable:[{pattern:/(\$)(?:::)?(?:[a-zA-Z0-9]+::)*\w+/,lookbehind:!0},{pattern:/(\$)\{[^}]+\}/,lookbehind:!0},{pattern:/(^[\t ]*set[ \t]+)(?:::)?(?:[a-zA-Z0-9]+::)*\w+/m,lookbehind:!0}],function:{pattern:/(^[\t ]*proc[ \t]+)\S+/m,lookbehind:!0},builtin:[{pattern:/(^[\t ]*)(?:break|class|continue|error|eval|exit|for|foreach|if|proc|return|switch|while)\b/m,lookbehind:!0},/\b(?:else|elseif)\b/],scope:{pattern:/(^[\t ]*)(?:global|upvar|variable)\b/m,lookbehind:!0,alias:"constant"},keyword:{pattern:/(^[\t ]*|\[)(?:Safe_Base|Tcl|after|append|apply|array|auto_(?:execok|import|load|mkindex|qualify|reset)|automkindex_old|bgerror|binary|catch|cd|chan|clock|close|concat|dde|dict|encoding|eof|exec|expr|fblocked|fconfigure|fcopy|file(?:event|name)?|flush|gets|glob|history|http|incr|info|interp|join|lappend|lassign|lindex|linsert|list|llength|load|lrange|lrepeat|lreplace|lreverse|lsearch|lset|lsort|math(?:func|op)|memory|msgcat|namespace|open|package|parray|pid|pkg_mkIndex|platform|puts|pwd|re_syntax|read|refchan|regexp|registry|regsub|rename|scan|seek|set|socket|source|split|string|subst|tcl(?:_endOfWord|_findLibrary|startOf(?:Next|Previous)Word|test|vars|wordBreak(?:After|Before))|tell|time|tm|trace|unknown|unload|unset|update|uplevel|vwait)\b/m,lookbehind:!0},operator:/!=?|\*\*?|==|&&?|\|\|?|<[=<]?|>[=>]?|[-+~\/%?^]|\b(?:eq|in|ne|ni)\b/,punctuation:/[{}()\[\]]/};