Restructure solution layout by module

src/Zastava/StellaOps.Zastava.Webhook/Admission/AdmissionRequestContext.cs

@@ -0,0 +1,15 @@
+using System.Text.Json;
+
+namespace StellaOps.Zastava.Webhook.Admission;
+
+internal sealed record AdmissionRequestContext(
+    string ApiVersion,
+    string Kind,
+    string Uid,
+    string Namespace,
+    IReadOnlyDictionary<string, string> Labels,
+    IReadOnlyList<AdmissionContainerReference> Containers,
+    JsonElement PodObject,
+    JsonElement PodSpec);
+
+internal sealed record AdmissionContainerReference(string Name, string Image);