♻️ 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/revert.js

@@ -1,49 +0,0 @@
-/**
- * @import {ElementContent} from 'hast'
- * @import {Reference, Nodes} from 'mdast'
- * @import {State} from './state.js'
- */
-
-/**
- * Return the content of a reference without definition as plain text.
- *
- * @param {State} state
- *   Info passed around.
- * @param {Extract<Nodes, Reference>} node
- *   Reference node (image, link).
- * @returns {Array<ElementContent>}
- *   hast content.
- */
-export function revert(state, node) {
-  const subtype = node.referenceType
-  let suffix = ']'
-
-  if (subtype === 'collapsed') {
-    suffix += '[]'
-  } else if (subtype === 'full') {
-    suffix += '[' + (node.label || node.identifier) + ']'
-  }
-
-  if (node.type === 'imageReference') {
-    return [{type: 'text', value: '![' + node.alt + suffix}]
-  }
-
-  const contents = state.all(node)
-  const head = contents[0]
-
-  if (head && head.type === 'text') {
-    head.value = '[' + head.value
-  } else {
-    contents.unshift({type: 'text', value: '['})
-  }
-
-  const tail = contents[contents.length - 1]
-
-  if (tail && tail.type === 'text') {
-    tail.value += suffix
-  } else {
-    contents.push({type: 'text', value: suffix})
-  }
-
-  return contents
-}