Add front- end backend for new category-group

web/src/stores/category.ts

@@ -24,6 +24,19 @@ export const useCategoryStore = defineStore("category", {
   getters: {
   },
   actions: {
+    async CreateCategoryGroup(
+      group: string,
+    ) {
+      const result = await POST(
+        "/category-group/new",
+        JSON.stringify({
+          budgetId: useBudgetsStore().CurrentBudgetID,
+          group: group,
+        })
+      );
+      const response = await result.json();
+      useCategoryStore().AddCategory(response);
+    },
     async CreateCategory(
       group: string,
       name: string,