moved a bunch of files

src/utils/helpers/isString.ts

@@ -0,0 +1,8 @@
+/**
+ * Checks whether the value passed in can be considered a string.
+ * @param value The value to check if it is a string.
+ */
+// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+export function isString(value: any): boolean {
+  return typeof value === "string" || value instanceof String;
+}