feat(project-finance): implement project finance API and frontend integration for task retrieval

worklenz-frontend/src/api/project-finance-ratecard/project-finance.api.service.ts

@@ -0,0 +1,21 @@
+import { API_BASE_URL } from "@/shared/constants";
+import { IServerResponse } from "@/types/common.types";
+import apiClient from "../api-client";
+import { IProjectFinanceGroup } from "@/types/project/project-finance.types";
+
+const rootUrl = `${API_BASE_URL}/project-finance`;
+
+export const projectFinanceApiService = {
+    getProjectTasks: async (
+        projectId: string,
+        groupBy: 'status' | 'priority' | 'phases' = 'status'
+      ): Promise<IServerResponse<IProjectFinanceGroup[]>> => {
+        const response = await apiClient.get<IServerResponse<IProjectFinanceGroup[]>>(
+          `${rootUrl}/project/${projectId}/tasks`,
+          {
+            params: { group_by: groupBy }
+          }
+        );
+        return response.data;
+      },
+}