added encounter system

Packages/com.jovian.encounter-system/Runtime/IEncounterEvent.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace Jovian.EncounterSystem {
+    /// <summary>Data-only dialog option side effect. Handlers are registered on <see cref="EncounterResolver"/>.</summary>
+    public interface IEncounterEvent {
+    }
+
+    [Serializable]
+    public class ChainToEncounterEvent : IEncounterEvent {
+        public string nextEncounterId;
+    }
+
+    [Serializable]
+    public class StartCombatEvent : IEncounterEvent {
+        public string combatEncounterId;
+    }
+
+    [Serializable]
+    public class LogEvent : IEncounterEvent {
+        public string message;
+    }
+
+    [Serializable]
+    public class GiveRewardEvent : IEncounterEvent {
+        public Reward reward;
+    }
+}