♻️ 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

✅ 11 pages built successfully
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✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/prismjs/components/prism-systemd.min.js

@@ -1 +0,0 @@
-!function(e){var t={pattern:/^[;#].*/m,greedy:!0},n='"(?:[^\r\n"\\\\]|\\\\(?:[^\r]|\r\n?))*"(?!\\S)';e.languages.systemd={comment:t,section:{pattern:/^\[[^\n\r\[\]]*\](?=[ \t]*$)/m,greedy:!0,inside:{punctuation:/^\[|\]$/,"section-name":{pattern:/[\s\S]+/,alias:"selector"}}},key:{pattern:/^[^\s=]+(?=[ \t]*=)/m,greedy:!0,alias:"attr-name"},value:{pattern:RegExp("(=[ \t]*(?!\\s))(?:"+n+'|(?=[^"\r\n]))(?:[^\\s\\\\]|[ \t]+(?:(?![ \t"])|'+n+")|\\\\[\r\n]+(?:[#;].*[\r\n]+)*(?![#;]))*"),lookbehind:!0,greedy:!0,alias:"attr-value",inside:{comment:t,quoted:{pattern:RegExp("(^|\\s)"+n),lookbehind:!0,greedy:!0},punctuation:/\\$/m,boolean:{pattern:/^(?:false|no|off|on|true|yes)$/,greedy:!0}}},punctuation:/=/}}(Prism);