Move more core logic to new folder

src/util/Strings.ts

@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+export const baseCleanup = (str: string) => str.toLowerCase().trim();
+
+export const enhancedCleanup = (str: string): string =>
+    baseCleanup(str)
+        .replace(/[^a-zA-Z0-9\\s]+/g, ' ')
+        .trim();