init kubectl (#830)

* init kubectl

* swagger version into assembly

tests/Kubectl.Tests/KubectlTests.Version.cs

@@ -0,0 +1,32 @@
+using k8s.E2E;
+using System.Text.Json;
+using Xunit;
+
+namespace k8s.kubectl.Tests;
+
+public partial class KubectlTests
+{
+    [MinikubeFact]
+    public void Version()
+    {
+        var client = CreateClient();
+        var version = client.Version();
+        var serverobj = version.ServerVersion;
+
+        var output = RunKubectl("version");
+
+        var serverstr = output.Split('\n').Skip(1).First().Trim();
+
+        Assert.Equal(serverstr, $"Server Version: version.Info{{Major:\"{serverobj.Major}\", Minor:\"{serverobj.Minor}\", GitVersion:\"{serverobj.GitVersion}\", GitCommit:\"{serverobj.GitCommit}\", GitTreeState:\"{serverobj.GitTreeState}\", BuildDate:\"{serverobj.BuildDate}\", GoVersion:\"{serverobj.GoVersion}\", Compiler:\"{serverobj.Compiler}\", Platform:\"{serverobj.Platform}\"}}");
+
+        dynamic? swagger = JsonSerializer.Deserialize(File.OpenRead("swagger.json"), new
+        {
+            info = new
+            {
+                version = "",
+            },
+        }.GetType());
+
+        Assert.Equal(swagger?.info.version, version.ClientSwaggerVersion);
+    }
+}