♻️ 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-elm.min.js

@@ -1 +0,0 @@
-Prism.languages.elm={comment:/--.*|\{-[\s\S]*?-\}/,char:{pattern:/'(?:[^\\'\r\n]|\\(?:[abfnrtv\\']|\d+|x[0-9a-fA-F]+|u\{[0-9a-fA-F]+\}))'/,greedy:!0},string:[{pattern:/"""[\s\S]*?"""/,greedy:!0},{pattern:/"(?:[^\\"\r\n]|\\.)*"/,greedy:!0}],"import-statement":{pattern:/(^[\t ]*)import\s+[A-Z]\w*(?:\.[A-Z]\w*)*(?:\s+as\s+(?:[A-Z]\w*)(?:\.[A-Z]\w*)*)?(?:\s+exposing\s+)?/m,lookbehind:!0,inside:{keyword:/\b(?:as|exposing|import)\b/}},keyword:/\b(?:alias|as|case|else|exposing|if|in|infixl|infixr|let|module|of|then|type)\b/,builtin:/\b(?:abs|acos|always|asin|atan|atan2|ceiling|clamp|compare|cos|curry|degrees|e|flip|floor|fromPolar|identity|isInfinite|isNaN|logBase|max|min|negate|never|not|pi|radians|rem|round|sin|sqrt|tan|toFloat|toPolar|toString|truncate|turns|uncurry|xor)\b/,number:/\b(?:\d+(?:\.\d+)?(?:e[+-]?\d+)?|0x[0-9a-f]+)\b/i,operator:/\s\.\s|[+\-/*=.$<>:&|^?%#@~!]{2,}|[+\-/*=$<>:&|^?%#@~!]/,hvariable:/\b(?:[A-Z]\w*\.)*[a-z]\w*\b/,constant:/\b(?:[A-Z]\w*\.)*[A-Z]\w*\b/,punctuation:/[{}[\]|(),.:]/};