♻️ 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-monkey.min.js

@@ -1 +0,0 @@
-Prism.languages.monkey={comment:{pattern:/^#Rem\s[\s\S]*?^#End|'.+/im,greedy:!0},string:{pattern:/"[^"\r\n]*"/,greedy:!0},preprocessor:{pattern:/(^[ \t]*)#.+/m,lookbehind:!0,greedy:!0,alias:"property"},function:/\b\w+(?=\()/,"type-char":{pattern:/\b[?%#$]/,alias:"class-name"},number:{pattern:/((?:\.\.)?)(?:(?:\b|\B-\.?|\B\.)\d+(?:(?!\.\.)\.\d*)?|\$[\da-f]+)/i,lookbehind:!0},keyword:/\b(?:Abstract|Array|Bool|Case|Catch|Class|Const|Continue|Default|Eachin|Else|ElseIf|End|EndIf|Exit|Extends|Extern|False|Field|Final|Float|For|Forever|Function|Global|If|Implements|Import|Inline|Int|Interface|Local|Method|Module|New|Next|Null|Object|Private|Property|Public|Repeat|Return|Select|Self|Step|Strict|String|Super|Then|Throw|To|True|Try|Until|Void|Wend|While)\b/i,operator:/\.\.|<[=>]?|>=?|:?=|(?:[+\-*\/&~|]|\b(?:Mod|Shl|Shr)\b)=?|\b(?:And|Not|Or)\b/i,punctuation:/[.,:;()\[\]]/};