♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/prismjs/components/prism-j.min.js

@@ -1 +0,0 @@
-Prism.languages.j={comment:{pattern:/\bNB\..*/,greedy:!0},string:{pattern:/'(?:''|[^'\r\n])*'/,greedy:!0},keyword:/\b(?:(?:CR|LF|adverb|conjunction|def|define|dyad|monad|noun|verb)\b|(?:assert|break|case|catch[dt]?|continue|do|else|elseif|end|fcase|for|for_\w+|goto_\w+|if|label_\w+|return|select|throw|try|while|whilst)\.)/,verb:{pattern:/(?!\^:|;\.|[=!][.:])(?:\{(?:\.|::?)?|p(?:\.\.?|:)|[=!\]]|[<>+*\-%$|,#][.:]?|[?^]\.?|[;\[]:?|[~}"i][.:]|[ACeEIjLor]\.|(?:[_\/\\qsux]|_?\d):)/,alias:"keyword"},number:/\b_?(?:(?!\d:)\d+(?:\.\d+)?(?:(?:ad|ar|[ejpx])_?\d+(?:\.\d+)?)*(?:b_?[\da-z]+(?:\.[\da-z]+)?)?|_\b(?!\.))/,adverb:{pattern:/[~}]|[\/\\]\.?|[bfM]\.|t[.:]/,alias:"builtin"},operator:/[=a][.:]|_\./,conjunction:{pattern:/&(?:\.:?|:)?|[.:@][.:]?|[!D][.:]|[;dHT]\.|`:?|[\^LS]:|"/,alias:"variable"},punctuation:/[()]/};