♻️ 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-dataweave.min.js

@@ -1 +0,0 @@
-!function(e){e.languages.dataweave={url:/\b[A-Za-z]+:\/\/[\w/:.?=&-]+|\burn:[\w:.?=&-]+/,property:{pattern:/(?:\b\w+#)?(?:"(?:\\.|[^\\"\r\n])*"|\b\w+)(?=\s*[:@])/,greedy:!0},string:{pattern:/(["'`])(?:\\[\s\S]|(?!\1)[^\\])*\1/,greedy:!0},"mime-type":/\b(?:application|audio|image|multipart|text|video)\/[\w+-]+/,date:{pattern:/\|[\w:+-]+\|/,greedy:!0},comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0,greedy:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],regex:{pattern:/\/(?:[^\\\/\r\n]|\\[^\r\n])+\//,greedy:!0},keyword:/\b(?:and|as|at|case|do|else|fun|if|input|is|match|not|ns|null|or|output|type|unless|update|using|var)\b/,function:/\b[A-Z_]\w*(?=\s*\()/i,number:/-?\b\d+(?:\.\d+)?(?:e[+-]?\d+)?\b/i,punctuation:/[{}[\];(),.:@]/,operator:/<<|>>|->|[<>~=]=?|!=|--?-?|\+\+?|!|\?/,boolean:/\b(?:false|true)\b/}}(Prism);