♻️ 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/mdast-util-to-markdown/index.d.ts

@@ -1,16 +0,0 @@
-export type {
-  ConstructNameMap,
-  ConstructName,
-  Handle,
-  Handlers,
-  Info,
-  Join,
-  Map,
-  Options,
-  SafeConfig,
-  State,
-  Tracker,
-  Unsafe
-} from './lib/types.js'
-export {toMarkdown} from './lib/index.js'
-export {handle as defaultHandlers} from './lib/handle/index.js'