♻️ 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-peoplecode.min.js

@@ -1 +0,0 @@
-Prism.languages.peoplecode={comment:RegExp(["/\\*[^]*?\\*/","\\bREM[^;]*;","<\\*(?:[^<*]|\\*(?!>)|<(?!\\*)|<\\*(?:(?!\\*>)[^])*\\*>)*\\*>","/\\+[^]*?\\+/"].join("|")),string:{pattern:/'(?:''|[^'\r\n])*'(?!')|"(?:""|[^"\r\n])*"(?!")/,greedy:!0},variable:/%\w+/,"function-definition":{pattern:/((?:^|[^\w-])(?:function|method)\s+)\w+/i,lookbehind:!0,alias:"function"},"class-name":{pattern:/((?:^|[^-\w])(?:as|catch|class|component|create|extends|global|implements|instance|local|of|property|returns)\s+)\w+(?::\w+)*/i,lookbehind:!0,inside:{punctuation:/:/}},keyword:/\b(?:abstract|alias|as|catch|class|component|constant|create|declare|else|end-(?:class|evaluate|for|function|get|if|method|set|try|while)|evaluate|extends|for|function|get|global|if|implements|import|instance|library|local|method|null|of|out|peopleCode|private|program|property|protected|readonly|ref|repeat|returns?|set|step|then|throw|to|try|until|value|when(?:-other)?|while)\b/i,"operator-keyword":{pattern:/\b(?:and|not|or)\b/i,alias:"operator"},function:/[_a-z]\w*(?=\s*\()/i,boolean:/\b(?:false|true)\b/i,number:/\b\d+(?:\.\d+)?\b/,operator:/<>|[<>]=?|!=|\*\*|[-+*/|=@]/,punctuation:/[:.;,()[\]]/},Prism.languages.pcode=Prism.languages.peoplecode;