♻️ 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/unist-util-visit-parents/index.d.ts

@@ -1,14 +0,0 @@
-export type {Test} from 'unist-util-is'
-export type {
-  Action,
-  ActionTuple,
-  BuildVisitor,
-  // Undocumented: used in `unist-util-visit`:
-  InclusiveDescendant,
-  Index,
-  // Undocumented: used in `unist-util-visit`:
-  Matches,
-  Visitor,
-  VisitorResult
-} from './lib/index.js'
-export {CONTINUE, EXIT, SKIP, visitParents} from './lib/index.js'