Add invalid-multi-line csv

apps/client/src/app/pages/portfolio/activities/import-activities-dialog/import-activities-dialog.component.ts

@@ -268,6 +268,7 @@ export class ImportActivitiesDialog implements OnDestroy {
           return;
         } else if (file.name.endsWith('.csv')) {
           const content: string[] = fileContent.split('\n').slice(1);
+
           try {
             const data = await this.importActivitiesService.importCsv({
               fileContent,

test/import/invalid-multi-line.csv

@@ -0,0 +1,4 @@
+Date,Code,Currency,Price,Quantity,Action,Fee
+12/10/2023,MSFT,USD,329.050,10,buy,0
+12/10/2023,AAPL,USD,179.050,20,<invalid>,0
+12/10/2023,GOOGL,USD,138.310,30,buy,0