feat: rebrand to Domain Scanner platform

Replace GeoExport static site with Next.js domain intelligence app:
real DNS/WHOIS/SSL/HTTP/geo scans, SSE progress, Docker stack,
updated install/uninstall scripts, and full documentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

site/package.json

@@ -1,13 +0,0 @@
-{
-  "name": "geoexport-clone",
-  "private": true,
-  "version": "1.0.0",
-  "description": "Local mirror of https://geoexport.org/",
-  "scripts": {
-    "start": "node server.mjs",
-    "dev": "node server.mjs"
-  },
-  "engines": {
-    "node": ">=18"
-  }
-}