♻️ 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/hast-util-to-html/lib/omission/omission.js

@@ -1,44 +0,0 @@
-/**
- * @import {Element, Parents} from 'hast'
- */
-
-/**
- * @callback OmitHandle
- *   Check if a tag can be omitted.
- * @param {Element} element
- *   Element to check.
- * @param {number | undefined} index
- *   Index of element in parent.
- * @param {Parents | undefined} parent
- *   Parent of element.
- * @returns {boolean}
- *   Whether to omit a tag.
- *
- */
-
-const own = {}.hasOwnProperty
-
-/**
- * Factory to check if a given node can have a tag omitted.
- *
- * @param {Record<string, OmitHandle>} handlers
- *   Omission handlers, where each key is a tag name, and each value is the
- *   corresponding handler.
- * @returns {OmitHandle}
- *   Whether to omit a tag of an element.
- */
-export function omission(handlers) {
-  return omit
-
-  /**
-   * Check if a given node can have a tag omitted.
-   *
-   * @type {OmitHandle}
-   */
-  function omit(node, index, parent) {
-    return (
-      own.call(handlers, node.tagName) &&
-      handlers[node.tagName](node, index, parent)
-    )
-  }
-}