Foundry-hosted-agents: add hosted agent sample using Azure AI Foundry

[nourshaker-msft]

Purpose

• Introducing AI Foundry Hosted Agents

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code
• Run the lab

[github-actions]

📋 Labs Config Preview

The following labs will be updated in docs/labs-config.json when this PR is merged:

• ai-foundry-hosted-agents

The config will be updated on both main and gh-pages branches.