♻️ 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/is-docker/index.d.ts

@@ -1,13 +0,0 @@
-/**
-Check if the process is running inside a Docker container.
-
-@example
-```
-import isDocker from 'is-docker';
-
-if (isDocker()) {
-	console.log('Running inside a Docker container');
-}
-```
-*/
-export default function isDocker(): boolean;