♻️ 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/plugins/command-line/prism-command-line.min.css

@@ -1 +0,0 @@
-.command-line-prompt{border-right:1px solid #999;display:block;float:left;font-size:100%;letter-spacing:-1px;margin-right:1em;pointer-events:none;text-align:right;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.command-line-prompt>span:before{opacity:.7;content:' ';display:block;padding-right:.8em}.command-line-prompt>span[data-user]:before{content:"[" attr(data-user) "@" attr(data-host) "] $"}.command-line-prompt>span[data-user=root]:before{content:"[" attr(data-user) "@" attr(data-host) "] #"}.command-line-prompt>span[data-prompt]:before{content:attr(data-prompt)}.command-line-prompt>span[data-continuation-prompt]:before{content:attr(data-continuation-prompt)}.command-line span.token.output{opacity:.7}