feat: URL-first CLI + auto-setup for new targets

- python -m scanner https://domain.de scan  (URL as first positional arg)
- On first use, the domain directory is auto-created from the
  meine-seite.de template with all paths and target URL substituted
- scanner.sh wrapper script for convenient ./scanner.sh usage
- --config syntax fully preserved (cron jobs unchanged)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scanner.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# Wrapper-Script für den integrity-scanner.
+# Wechselt ins Projektverzeichnis und ruft python -m scanner auf.
+# Verwendung: ./scanner.sh https://domain.de scan
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+exec python -m scanner "$@"