feat: add WorkloadClient to Connect client

[markgoddard]

Currently this does not support publishing workloads, only listing them.

[github-actions]

The latest Buf updates on your PR. Results from workflow buf-ci / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jun 26, 2025, 11:59 AM

[gemini-code-assist]

Summary of Changes

Hello @markgoddard, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new client for interacting with the Workload service within the cofide-api-sdk. It provides the necessary interfaces, implementations, and fake clients to enable listing of workloads.

Highlights

• New WorkloadClient: I've added a new WorkloadClient to the Connect client SDK, allowing programmatic interaction with the Workload service. This client currently supports listing workloads.
• ClientSet Integration: The new WorkloadClient has been integrated into the main ClientSet interface and its implementation, making it accessible alongside other existing clients.
• Fake Client and Test Utilities: A corresponding fake WorkloadClient implementation has been added for testing purposes, along with new test utilities to generate fake Kubernetes Pod Workload data.

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[gemini-code-assist]

Code Review

This pull request introduces the WorkloadClient to the Connect client, enabling listing workloads. The changes include adding necessary protobuf definitions, client implementations, and fake implementations for testing. The review focuses on improving code consistency and readability.

[jsnctl]

Looks good other than Gemini suggestion on receiver method