♻️ 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-chaiscript.min.js

@@ -1 +0,0 @@
-Prism.languages.chaiscript=Prism.languages.extend("clike",{string:{pattern:/(^|[^\\])'(?:[^'\\]|\\[\s\S])*'/,lookbehind:!0,greedy:!0},"class-name":[{pattern:/(\bclass\s+)\w+/,lookbehind:!0},{pattern:/(\b(?:attr|def)\s+)\w+(?=\s*::)/,lookbehind:!0}],keyword:/\b(?:attr|auto|break|case|catch|class|continue|def|default|else|finally|for|fun|global|if|return|switch|this|try|var|while)\b/,number:[Prism.languages.cpp.number,/\b(?:Infinity|NaN)\b/],operator:/>>=?|<<=?|\|\||&&|:[:=]?|--|\+\+|[=!<>+\-*/%|&^]=?|[?~]|`[^`\r\n]{1,4}`/}),Prism.languages.insertBefore("chaiscript","operator",{"parameter-type":{pattern:/([,(]\s*)\w+(?=\s+\w)/,lookbehind:!0,alias:"class-name"}}),Prism.languages.insertBefore("chaiscript","string",{"string-interpolation":{pattern:/(^|[^\\])"(?:[^"$\\]|\\[\s\S]|\$(?!\{)|\$\{(?:[^{}]|\{(?:[^{}]|\{[^{}]*\})*\})*\})*"/,lookbehind:!0,greedy:!0,inside:{interpolation:{pattern:/((?:^|[^\\])(?:\\{2})*)\$\{(?:[^{}]|\{(?:[^{}]|\{[^{}]*\})*\})*\}/,lookbehind:!0,inside:{"interpolation-expression":{pattern:/(^\$\{)[\s\S]+(?=\}$)/,lookbehind:!0,inside:Prism.languages.chaiscript},"interpolation-punctuation":{pattern:/^\$\{|\}$/,alias:"punctuation"}}},string:/[\s\S]+/}}});