♻️ 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/mdast-util-to-markdown/lib/util/format-link-as-autolink.js

@@ -1,34 +0,0 @@
-/**
- * @import {State} from 'mdast-util-to-markdown'
- * @import {Link} from 'mdast'
- */
-
-import {toString} from 'mdast-util-to-string'
-
-/**
- * @param {Link} node
- * @param {State} state
- * @returns {boolean}
- */
-export function formatLinkAsAutolink(node, state) {
-  const raw = toString(node)
-
-  return Boolean(
-    !state.options.resourceLink &&
-      // If there’s a url…
-      node.url &&
-      // And there’s a no title…
-      !node.title &&
-      // And the content of `node` is a single text node…
-      node.children &&
-      node.children.length === 1 &&
-      node.children[0].type === 'text' &&
-      // And if the url is the same as the content…
-      (raw === node.url || 'mailto:' + raw === node.url) &&
-      // And that starts w/ a protocol…
-      /^[a-z][a-z+.-]+:/i.test(node.url) &&
-      // And that doesn’t contain ASCII control codes (character escapes and
-      // references don’t work), space, or angle brackets…
-      !/[\0- <>\u007F]/.test(node.url)
-  )
-}