Add containerd detection and workaround for azd package failures

[Copilot]

Problem

Customers using Docker Desktop with containerd image store enabled encounter failures when running azd package with easy-init/simplified-init flow. The error manifests as:

ERROR: failed to build: failed to write image to the following tags: [pack.local/builder/657662746b6877776b68:latest: saving image "pack.local/builder/657662746b6877776b68:latest": Error response from daemon: No such image: sha256:1a3f079e7ffed5eb4c02ecf6fdcc38c8fe459b021b4803471703dbded90181c4]

This occurs because containerd image store has compatibility issues with certain Docker build operations used by buildpacks.

Solution

This PR implements a detection mechanism and user-friendly workaround suggestion:

1. Detection Method: Added IsContainerdEnabled() to detect when Docker is using containerd as the image store by checking docker info -f "{{ .DriverStatus }}" for the containerd driver signature.

2. Error Pattern Matching: Added isContainerdBuildError() to identify the specific error pattern that occurs with containerd-related build failures.

3. Helpful Suggestion: When both conditions are met (containerd error + containerd enabled), the code provides a clear suggestion to disable containerd in Docker Desktop settings.

Example Output

Before:

ERROR: building container: myapp at .: failed to build: failed to write image...

After (when containerd is detected):

ERROR: building container: myapp at .: failed to build: failed to write image...

SUGGESTION: Docker build failed with containerd image store enabled. Try disabling the containerd image store in Docker Desktop settings under 'Features in development' and run 'azd package' again

Testing

• Added comprehensive test coverage for containerd detection
• Added tests for error pattern matching and suggestion behavior
• All existing tests continue to pass
• Code follows repository standards (formatting, linting, spell checking)

Fixes Azure#3.

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