♻️ 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/handle/index.js

@@ -1,47 +0,0 @@
-/**
- * @import {Nodes, Parents} from 'hast'
- * @import {State} from '../index.js'
- */
-
-import {zwitch} from 'zwitch'
-import {comment} from './comment.js'
-import {doctype} from './doctype.js'
-import {element} from './element.js'
-import {raw} from './raw.js'
-import {root} from './root.js'
-import {text} from './text.js'
-
-/**
- * @type {(node: Nodes, index: number | undefined, parent: Parents | undefined, state: State) => string}
- */
-export const handle = zwitch('type', {
-  invalid,
-  unknown,
-  handlers: {comment, doctype, element, raw, root, text}
-})
-
-/**
- * Fail when a non-node is found in the tree.
- *
- * @param {unknown} node
- *   Unknown value.
- * @returns {never}
- *   Never.
- */
-function invalid(node) {
-  throw new Error('Expected node, not `' + node + '`')
-}
-
-/**
- * Fail when a node with an unknown type is found in the tree.
- *
- * @param {unknown} node_
- *  Unknown node.
- * @returns {never}
- *   Never.
- */
-function unknown(node_) {
-  // `type` is guaranteed by runtime JS.
-  const node = /** @type {Nodes} */ (node_)
-  throw new Error('Cannot compile unknown node `' + node.type + '`')
-}