feat: add find message action in Slack

packages/backend/src/apps/slack/actions/find-message.ts

@@ -0,0 +1,26 @@
+import SlackClient from '../client';
+
+export default class FindMessage {
+  client: SlackClient;
+
+  constructor(client: SlackClient) {
+    this.client = client;
+  }
+
+  async run() {
+    const parameters = this.client.step.parameters;
+    const query = parameters.query as string;
+    const sortBy = parameters.sortBy as string;
+    const sortDirection = parameters.sortDirection as string;
+    const count = 1;
+
+    const messages = await this.client.findMessages.run(
+      query,
+      sortBy,
+      sortDirection,
+      count,
+    );
+
+    return messages;
+  }
+}