Add reset website statistics to settings

lib/queries.js

@@ -141,6 +141,10 @@ export async function updateWebsite(website_id, data) {
   );
 }
 
+export async function resetWebsite(website_id) {
+  return runQuery(prisma.$queryRaw`delete from session where website_id=${website_id}`);
+}
+
 export async function deleteWebsite(website_id) {
   return runQuery(
     /* Prisma bug, does not cascade on non-nullable foreign keys