♻️ 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-bbj.min.js

@@ -1 +0,0 @@
-!function(e){e.languages.bbj={comment:{pattern:/(^|[^\\:])rem\s+.*/i,lookbehind:!0,greedy:!0},string:{pattern:/(['"])(?:(?!\1|\\).|\\.)*\1/,greedy:!0},number:/(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:E[+-]?\d+)?/i,keyword:/\b(?:abstract|all|argc|begin|bye|callback|case|chn|class|classend|ctl|day|declare|delete|dim|dom|dread|dsz|else|end|endif|err|exitto|extends|fi|field|for|from|gosub|goto|if|implements|interface|interfaceend|iol|iolist|let|list|load|method|methodend|methodret|on|opts|pfx|print|private|process_events|protected|psz|public|read|read_resource|release|remove_callback|repeat|restore|return|rev|seterr|setesc|sqlchn|sqlunt|ssn|start|static|swend|switch|sys|then|tim|unt|until|use|void|wend|where|while)\b/i,function:/\b\w+(?=\()/,boolean:/\b(?:BBjAPI\.TRUE|BBjAPI\.FALSE)\b/i,operator:/<[=>]?|>=?|[+\-*\/^=&]|\b(?:and|not|or|xor)\b/i,punctuation:/[.,;:()]/}}(Prism);