Python: Add computer use tool sample

[TaoChenOSU]

Motivation and Context

Add a sample to show how to create and use an Azure AI agent with a computer use tool.

Description

Add a sample to show how to create and use an Azure AI agent with a computer use tool.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/core/agent_framework/openai
_responses_client.py	418	71	83%	144–145, 148–149, 155–156, 159, 166, 201, 231, 259–260, 287, 291, 308, 313, 355, 416, 421, 498, 503, 507–509, 530, 545–546, 550–552, 600, 620–621, 634–635, 651–652, 690, 692, 730, 732, 741–742, 755, 757, 830–836, 853–858, 877, 895, 905, 907, 925–926, 928–930, 941–942, 945, 947
TOTAL	14700	2121	85%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
2036	129 💤	0 ❌	0 🔥	38.945s ⏱️