♻️ 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-turtle.min.js

@@ -1 +0,0 @@
-Prism.languages.turtle={comment:{pattern:/#.*/,greedy:!0},"multiline-string":{pattern:/"""(?:(?:""?)?(?:[^"\\]|\\.))*"""|'''(?:(?:''?)?(?:[^'\\]|\\.))*'''/,greedy:!0,alias:"string",inside:{comment:/#.*/}},string:{pattern:/"(?:[^\\"\r\n]|\\.)*"|'(?:[^\\'\r\n]|\\.)*'/,greedy:!0},url:{pattern:/<(?:[^\x00-\x20<>"{}|^`\\]|\\(?:u[\da-fA-F]{4}|U[\da-fA-F]{8}))*>/,greedy:!0,inside:{punctuation:/[<>]/}},function:{pattern:/(?:(?![-.\d\xB7])[-.\w\xB7\xC0-\uFFFD]+)?:(?:(?![-.])(?:[-.:\w\xC0-\uFFFD]|%[\da-f]{2}|\\.)+)?/i,inside:{"local-name":{pattern:/([^:]*:)[\s\S]+/,lookbehind:!0},prefix:{pattern:/[\s\S]+/,inside:{punctuation:/:/}}}},number:/[+-]?\b\d+(?:\.\d*)?(?:e[+-]?\d+)?/i,punctuation:/[{}.,;()[\]]|\^\^/,boolean:/\b(?:false|true)\b/,keyword:[/(?:\ba|@prefix|@base)\b|=/,/\b(?:base|graph|prefix)\b/i],tag:{pattern:/@[a-z]+(?:-[a-z\d]+)*/i,inside:{punctuation:/@/}}},Prism.languages.trig=Prism.languages.turtle;