♻️ 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/escape-string-regexp/index.d.ts

@@ -1,16 +0,0 @@
-/**
-Escape RegExp special characters.
-
-You can also use this to escape a string that is inserted into the middle of a regex, for example, into a character class.
-
-@example
-```
-import escapeStringRegexp from 'escape-string-regexp';
-
-const escapedString = escapeStringRegexp('How much $ for a 🦄?');
-//=> 'How much \\$ for a 🦄\\?'
-
-new RegExp(escapedString);
-```
-*/
-export default function escapeStringRegexp(string: string): string;