Stop existing detector before creating a new one in startDetector()

Prevents orphaned detector state when load() is called multiple times.

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/cookie-banner/src/client.ts

@@ -255,6 +255,9 @@ export class CookieBannerClient {
       }
     }
 
+    if (this.detector) {
+      this.detector.stop();
+    }
     this.detector = new CookieDetector(this.baseUrl, this.bannerId, knownNames);
     this.detector.start();
   }