Add copyright notice

app/api/expenses.tsx

@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Expense } from '@/app/lib/definitions';
 import { getCsrfToken } from '@/app/lib/utils';
 

app/api/groups.tsx

@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Group } from '@/app/lib/definitions';
 
 export function loadGroups(onLoad?: (groups: Group[]) => void) {

app/api/guests.tsx

@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { Guest } from '@/app/lib/definitions';
 import { getCsrfToken } from '@/app/lib/utils';
 

app/api/tableSimulations.tsx

@@ -1,3 +1,5 @@
+/* Copyright (C) 2024 Manuel Bustillo*/
+
 import { TableArrangement } from '@/app/lib/definitions';
 
 export function loadTableSimulations(onLoad?: (tableSimulations: TableArrangement[]) => void) {