refactor: reorganize Kubernetes client models into separate files

[tg123]

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[Copilot]

Pull Request Overview

This refactor reorganizes Kubernetes client model interfaces by moving them from the root namespace to a dedicated Models subfolder and updating the namespace from k8s to k8s.Models.

• Moved interface files (IStatus, ISpec, IMetadata, IItems) from root to Models folder
• Updated namespace from k8s to k8s.Models for better organization
• Updated project file references to reflect new file locations

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/KubernetesClient/Models/IStatus.cs	Updated namespace from k8s to k8s.Models
src/KubernetesClient/Models/ISpec.cs	Moved interface to Models folder with updated namespace
src/KubernetesClient/Models/IMetadata.cs	Moved interface to Models folder with updated namespace
src/KubernetesClient/Models/IItems.cs	Moved interface to Models folder with updated namespace
src/KubernetesClient/ISpec.cs	Removed original file
src/KubernetesClient/IMetadata.cs	Removed original file
src/KubernetesClient/IItems.cs	Removed original file
src/KubernetesClient.Classic/KubernetesClient.Classic.csproj	Updated file references to new Models folder paths
src/KubernetesClient.Aot/KubernetesClient.Aot.csproj	Updated file references to new Models folder paths
examples/clientset/Program.cs	Added using directive for k8s.Models namespace

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