♻️ 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-avro-idl.min.js

@@ -1 +0,0 @@
-Prism.languages["avro-idl"]={comment:{pattern:/\/\/.*|\/\*[\s\S]*?\*\//,greedy:!0},string:{pattern:/(^|[^\\])"(?:[^\r\n"\\]|\\.)*"/,lookbehind:!0,greedy:!0},annotation:{pattern:/@(?:[$\w.-]|`[^\r\n`]+`)+/,greedy:!0,alias:"function"},"function-identifier":{pattern:/`[^\r\n`]+`(?=\s*\()/,greedy:!0,alias:"function"},identifier:{pattern:/`[^\r\n`]+`/,greedy:!0},"class-name":{pattern:/(\b(?:enum|error|protocol|record|throws)\b\s+)[$\w]+/,lookbehind:!0,greedy:!0},keyword:/\b(?:array|boolean|bytes|date|decimal|double|enum|error|false|fixed|float|idl|import|int|local_timestamp_ms|long|map|null|oneway|protocol|record|schema|string|throws|time_ms|timestamp_ms|true|union|uuid|void)\b/,function:/\b[a-z_]\w*(?=\s*\()/i,number:[{pattern:/(^|[^\w.])-?(?:(?:\d+(?:\.\d*)?|\.\d+)(?:e[+-]?\d+)?|0x(?:[a-f0-9]+(?:\.[a-f0-9]*)?|\.[a-f0-9]+)(?:p[+-]?\d+)?)[dfl]?(?![\w.])/i,lookbehind:!0},/-?\b(?:Infinity|NaN)\b/],operator:/=/,punctuation:/[()\[\]{}<>.:,;-]/},Prism.languages.avdl=Prism.languages["avro-idl"];