Init commit

Models/Gerbil.cs

@@ -0,0 +1,11 @@
+namespace GerbilManager.Models
+{
+    public record Gerbil
+    {
+        public Guid Id { get; init; }
+        public string Name { get; init; }
+        public Gender Gender { get; init; }
+        public Litter Litter { get; init; }
+        public Breeder Breeder { get; init; }
+    }
+}