♻️ 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-keyman.min.js

@@ -1 +0,0 @@
-Prism.languages.keyman={comment:{pattern:/\bc .*/i,greedy:!0},string:{pattern:/"[^"\r\n]*"|'[^'\r\n]*'/,greedy:!0},"virtual-key":{pattern:/\[\s*(?:(?:ALT|CAPS|CTRL|LALT|LCTRL|NCAPS|RALT|RCTRL|SHIFT)\s+)*(?:[TKU]_[\w?]+|[A-E]\d\d?|"[^"\r\n]*"|'[^'\r\n]*')\s*\]/i,greedy:!0,alias:"function"},"header-keyword":{pattern:/&\w+/,alias:"bold"},"header-statement":{pattern:/\b(?:bitmap|bitmaps|caps always off|caps on only|copyright|hotkey|language|layout|message|name|shift frees caps|version)\b/i,alias:"bold"},"rule-keyword":{pattern:/\b(?:any|baselayout|beep|call|context|deadkey|dk|if|index|layer|notany|nul|outs|platform|reset|return|save|set|store|use)\b/i,alias:"keyword"},"structural-keyword":{pattern:/\b(?:ansi|begin|group|match|newcontext|nomatch|postkeystroke|readonly|unicode|using keys)\b/i,alias:"keyword"},"compile-target":{pattern:/\$(?:keyman|keymanonly|keymanweb|kmfl|weaver):/i,alias:"property"},number:/\b(?:U\+[\dA-F]+|d\d+|x[\da-f]+|\d+)\b/i,operator:/[+>\\$]|\.\./,punctuation:/[()=,]/};