♻️ 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

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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/parse-latin/lib/plugin/remove-empty-nodes.js

@@ -1,23 +0,0 @@
-/**
- * @typedef {import('nlcst').Paragraph} Paragraph
- * @typedef {import('nlcst').Root} Root
- */
-
-import {modifyChildren} from 'unist-util-modify-children'
-
-// Remove empty children.
-export const removeEmptyNodes = modifyChildren(
-  /**
-   * @type {import('unist-util-modify-children').Modifier<Paragraph | Root>}
-   */
-
-  function (child, index, parent) {
-    if ('children' in child && child.children.length === 0) {
-      parent.children.splice(index, 1)
-
-      // Next, iterate over the node *now* at the current position (which was the
-      // next node).
-      return index
-    }
-  }
-)