♻️ 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/regex/dist/cjs/flag-n.d.ts

@@ -1,4 +0,0 @@
-export function flagNPreprocessor(value: import("./regex.js").InterpolatedValue, runningContext: import("./utils.js").RunningContext, options: Required<import("./regex.js").RegexTagOptions>): {
-    transformed: string;
-    runningContext: import("./utils.js").RunningContext;
-};