♻️ 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-llvm.min.js

@@ -1 +0,0 @@
-!function(a){a.languages.llvm={comment:/;.*/,string:{pattern:/"[^"]*"/,greedy:!0},boolean:/\b(?:false|true)\b/,variable:/[%@!#](?:(?!\d)(?:[-$.\w]|\\[a-f\d]{2})+|\d+)/i,label:/(?!\d)(?:[-$.\w]|\\[a-f\d]{2})+:/i,type:{pattern:/\b(?:double|float|fp128|half|i[1-9]\d*|label|metadata|ppc_fp128|token|void|x86_fp80|x86_mmx)\b/,alias:"class-name"},keyword:/\b[a-z_][a-z_0-9]*\b/,number:/[+-]?\b\d+(?:\.\d+)?(?:[eE][+-]?\d+)?\b|\b0x[\dA-Fa-f]+\b|\b0xK[\dA-Fa-f]{20}\b|\b0x[ML][\dA-Fa-f]{32}\b|\b0xH[\dA-Fa-f]{4}\b/,punctuation:/[{}[\];(),.!*=<>]/}}(Prism);