Integration for Azure.AI.projects

[aaronpowell]

Description

A client integration for working with the Azure.AI.Projects SDK, which allows you to create agents using Agent Service.

Currently, the integration added AIProjectClient to the service collection, and from that you can create an AgentClient (see the sample app), but I wonder if we should have a way to register the AgentClient as part of the initial registration (and similarly expand out to the other available clients, I just haven't used them yet).

Fixes #7768

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Is this introducing a breaking change?
      • Yes
        • Link to aspire-docs issue (please use this breaking-change template):
      • No
        • Link to aspire-docs issue (please use this doc-idea template):
  • No

[aaronpowell]

Note - there is a new NuGet package required for this that isn't in the proxy package feed, Azure.AI.Projects 1.0.0-beta.3, so that needs to be pulled in for CI.