♻️ 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-wiki.min.js

@@ -1 +0,0 @@
-Prism.languages.wiki=Prism.languages.extend("markup",{"block-comment":{pattern:/(^|[^\\])\/\*[\s\S]*?\*\//,lookbehind:!0,alias:"comment"},heading:{pattern:/^(=+)[^=\r\n].*?\1/m,inside:{punctuation:/^=+|=+$/,important:/.+/}},emphasis:{pattern:/('{2,5}).+?\1/,inside:{"bold-italic":{pattern:/(''''').+?(?=\1)/,lookbehind:!0,alias:["bold","italic"]},bold:{pattern:/(''')[^'](?:.*?[^'])?(?=\1)/,lookbehind:!0},italic:{pattern:/('')[^'](?:.*?[^'])?(?=\1)/,lookbehind:!0},punctuation:/^''+|''+$/}},hr:{pattern:/^-{4,}/m,alias:"punctuation"},url:[/ISBN +(?:97[89][ -]?)?(?:\d[ -]?){9}[\dx]\b|(?:PMID|RFC) +\d+/i,/\[\[.+?\]\]|\[.+?\]/],variable:[/__[A-Z]+__/,/\{{3}.+?\}{3}/,/\{\{.+?\}\}/],symbol:[/^#redirect/im,/~{3,5}/],"table-tag":{pattern:/((?:^|[|!])[|!])[^|\r\n]+\|(?!\|)/m,lookbehind:!0,inside:{"table-bar":{pattern:/\|$/,alias:"punctuation"},rest:Prism.languages.markup.tag.inside}},punctuation:/^(?:\{\||\|\}|\|-|[*#:;!|])|\|\||!!/m}),Prism.languages.insertBefore("wiki","tag",{nowiki:{pattern:/<(nowiki|pre|source)\b[^>]*>[\s\S]*?<\/\1>/i,inside:{tag:{pattern:/<(?:nowiki|pre|source)\b[^>]*>|<\/(?:nowiki|pre|source)>/i,inside:Prism.languages.markup.tag.inside}}}});