refactor(frontend): replace legacy utils JS files with typed TS equivalents

frontend/src/static/js/utils/helpers/errors.ts

@@ -0,0 +1,15 @@
+// @todo: Improve or (even better) remove this file.
+
+import { error, warn } from './log';
+
+export function logErrorAndReturnError(msgArr: string[]) {
+    const err = new Error(msgArr[0]);
+    error(...msgArr);
+    return err;
+}
+
+export function logWarningAndReturnError(msgArr: string[]) {
+    const err = new Error(msgArr[0]);
+    warn(...msgArr);
+    return err;
+}