feat: All models added to game service

Models/Database/Dialogue.cs

@@ -0,0 +1,16 @@
+namespace GamificationService.Models.Database;
+
+public class Dialogue
+{
+    public Guid Id { get; set; }
+
+    public Guid MissionId { get; set; }
+    public required Mission Mission { get; set; }
+
+    public Guid InitialDialogueMessageId { get; set; }
+    public Dialogue? InitialDialogueMessage { get; set; }
+    public Guid InterimDialogueMessageId { get; set; }
+    public Dialogue? InterimDialogueMessage { get; set; }
+    public Guid EndDialogueMessageId { get; set; }
+    public Dialogue? EndDialogueMessage { get; set; }
+}