Add import/export tooling and templates

src/models/ImportExportLog.ts

@@ -0,0 +1,18 @@
+export type ImportExportType = 'import' | 'export';
+
+export interface ImportExportLogSummary {
+  inserted: number;
+  updated: number;
+  skipped: number;
+  errors: number;
+}
+
+export interface ImportExportLog {
+  id: string;
+  type: ImportExportType;
+  timestamp: number;
+  selectedTypes: string[];
+  summary: ImportExportLogSummary;
+  details: string[];
+  fileNames?: string[];
+}