Add traceActivities sample (#518)

Author: ceciliaavila

samples/basic/traceActivities.ts

@@ -0,0 +1,18 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+import { startServer } from '@microsoft/agents-hosting-express'
+import { AgentApplication, MemoryStorage, TurnContext, TurnState } from '@microsoft/agents-hosting'
+
+const agent = new AgentApplication<TurnState>({ storage: new MemoryStorage() })
+
+agent.onConversationUpdate('membersAdded', async (context: TurnContext) => {
+  await context.sendActivity('Welcome to the Trace Activities sample, send a message to see the feature in action.\nTrace activities are only shown in the Emulator channel.')
+})
+
+agent.onActivity('message', async (context: TurnContext) => {
+  await context.sendTraceActivity('Testing Trace', 'This is a trace activity')
+  await context.sendActivity('I sent you a Trace activity. Check the inspection panel')
+})
+
+startServer(agent)