feat(web): 添加拓扑图页面和相关组件

feat(csms): 添加获取当前连接状态的API
feat(csms): 添加获取当前活动OCPP WebSocket连接的接口
deps(web): 添加@xyflow/react依赖

apps/web/lib/api.ts

@@ -68,6 +68,10 @@ export type ConnectorDetail = {
   updatedAt: string;
 };
 
+export type ConnectionsStatus = {
+  connectedIdentifiers: string[];
+};
+
 export type ChargePoint = {
   id: string;
   chargePointIdentifier: string;
@@ -204,6 +208,7 @@ export const api = {
   chargePoints: {
     list: () => apiFetch<ChargePoint[]>("/api/charge-points"),
     get: (id: string) => apiFetch<ChargePointDetail>(`/api/charge-points/${id}`),
+    connections: () => apiFetch<ConnectionsStatus>("/api/charge-points/connections"),
     create: (data: {
       chargePointIdentifier: string;
       chargePointVendor?: string;