♻️ 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
✅ Cookie consent banner included
✅ 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-hast/lib/handlers/link.js

@@ -1,36 +0,0 @@
-/**
- * @import {Element, Properties} from 'hast'
- * @import {Link} from 'mdast'
- * @import {State} from '../state.js'
- */
-
-import {normalizeUri} from 'micromark-util-sanitize-uri'
-
-/**
- * Turn an mdast `link` node into hast.
- *
- * @param {State} state
- *   Info passed around.
- * @param {Link} node
- *   mdast node.
- * @returns {Element}
- *   hast node.
- */
-export function link(state, node) {
-  /** @type {Properties} */
-  const properties = {href: normalizeUri(node.url)}
-
-  if (node.title !== null && node.title !== undefined) {
-    properties.title = node.title
-  }
-
-  /** @type {Element} */
-  const result = {
-    type: 'element',
-    tagName: 'a',
-    properties,
-    children: state.all(node)
-  }
-  state.patch(node, result)
-  return state.applyData(node, result)
-}