v0.0.10: Update target frameworks and package versions

Updated target frameworks to net9.0 in KubeSharpOperator.csproj and TestJob.csproj. Upgraded KubernetesClient package to 16.0.2 and Microsoft.VisualStudio.Azure.Containers.Tools.Targets package to 1.21.1. Refactored kube.cshtml.cs to use CoreV1 property for listing namespaces and pods. Modified IsRunningInKubernetes method to use System.IO.File.Exists.