feat: Implement getData query and send a message action for slack

packages/backend/src/apps/slack/data.ts

@@ -0,0 +1,10 @@
+import ListChannels from './data/list-channels';
+import { IJSONObject } from '@automatisch/types';
+
+export default class Data {
+  listChannels: ListChannels;
+
+  constructor(connectionData: IJSONObject) {
+    this.listChannels = new ListChannels(connectionData);
+  }
+}