♻️ 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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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/unist-util-remove-position/lib/index.d.ts

@@ -1,26 +0,0 @@
-/**
- * Remove the `position` field from a tree.
- *
- * @param {Node} tree
- *   Tree to clean.
- * @param {Options | null | undefined} [options={force: false}]
- *   Configuration (default: `{force: false}`).
- * @returns {undefined}
- *   Nothing.
- */
-export function removePosition(
-  tree: Node,
-  options?: Options | null | undefined
-): undefined
-export type Node = import('unist').Node
-/**
- * Configuration.
- */
-export type Options = {
-  /**
-   * Whether to use `delete` to remove `position` fields.
-   *
-   * The default is to set them to `undefined`.
-   */
-  force?: boolean | null | undefined
-}

dealplustech-astro/node_modules/unist-util-remove-position/lib/index.js

@@ -1,42 +0,0 @@
-/**
- * @typedef {import('unist').Node} Node
- */
-
-/**
- * @typedef Options
- *   Configuration.
- * @property {boolean | null | undefined} [force=false]
- *   Whether to use `delete` to remove `position` fields.
- *
- *   The default is to set them to `undefined`.
- */
-
-import {visit} from 'unist-util-visit'
-
-/**
- * Remove the `position` field from a tree.
- *
- * @param {Node} tree
- *   Tree to clean.
- * @param {Options | null | undefined} [options={force: false}]
- *   Configuration (default: `{force: false}`).
- * @returns {undefined}
- *   Nothing.
- */
-export function removePosition(tree, options) {
-  const config = options || {}
-  const force = config.force || false
-
-  visit(tree, remove)
-
-  /**
-   * @param {Node} node
-   */
-  function remove(node) {
-    if (force) {
-      delete node.position
-    } else {
-      node.position = undefined
-    }
-  }
-}