save / load column mapping file for delimiter-separated values (dsv) file

src/locales/helpers.ts

@@ -79,10 +79,13 @@ import {
 
 import {
     TransactionEditScopeType,
-    TransactionTagFilterType,
-    ImportTransactionColumnType
+    TransactionTagFilterType
 } from '@/core/transaction.ts';
 
+import {
+    ImportTransactionColumnType
+} from '@/core/import_transaction.ts';
+
 import {
     ScheduledTemplateFrequencyType
 } from '@/core/template.ts';