refactor: simplify the PacketClient availability check process & add action nc_get_packet_status

src/onebot/action/packet/GetPacketStatus.ts

@@ -0,0 +1,25 @@
+import BaseAction from '../BaseAction';
+import {ActionName, BaseCheckResult} from '../types';
+
+
+export abstract class GetPacketStatusDepends<PT, RT> extends BaseAction<PT, RT> {
+    actionName = ActionName.GetPacketStatus;
+
+    protected async check(): Promise<BaseCheckResult>{
+        if (!this.core.apis.PacketApi.available) {
+            return {
+                valid: false,
+                message: "PacketClient is not available!",
+            }
+        }
+        return {
+            valid: true,
+        }
+    }
+}
+
+export class GetPacketStatus extends GetPacketStatusDepends<any, null> {
+    async _handle(payload: any) {
+        return null
+    }
+}