Move core files into new folder

src/modules/core/utils/LazyLoad.tsx

@@ -0,0 +1,11 @@
+/*
+ * 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/.
+ */
+
+import { LoadingPlaceholder } from '@/modules/core/components/placeholder/LoadingPlaceholder.tsx';
+
+export const lazyLoadFallback = { fallback: <LoadingPlaceholder /> };

src/modules/core/utils/ShouldForwardProp.ts

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+/*
+ * 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/.
+ */
+
+type TupleUnion<U extends string | number | symbol, R extends any[] = []> = {
+    [S in U]: Exclude<U, S> extends never ? [...R, S] : TupleUnion<Exclude<U, S>, [...R, S]>;
+}[U];
+
+export const shouldForwardProp =
+    <TCustomProps extends Record<string, unknown>>(customProps: TupleUnion<keyof TCustomProps>) =>
+    (prop: string): boolean =>
+        // @ts-ignore - TS2589: Type instantiation is excessively deep and possibly infinite.
+        // this function should never be used without a strict type, thus, this error can be ignored
+        !customProps.includes(prop);