added encounter system

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

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+
+namespace Jovian.EncounterSystem {
+    /// <summary>Dispatches <see cref="IEncounterEvent"/> instances to per-type handlers. Unknown types are skipped.</summary>
+    public class EncounterResolver {
+        private readonly Dictionary<Type, Action<IEncounterEvent, EncounterContext>> handlers = new();
+
+        public void Register<T>(Action<T, EncounterContext> handler) where T : IEncounterEvent {
+            // Wrap the typed delegate so the dictionary can hold handlers for any event type uniformly.
+            // Cast is safe because the wrapper is only invoked via lookup under typeof(T).
+            handlers[typeof(T)] = (evt, ctx) => handler((T)evt, ctx);
+        }
+
+        public void Unregister<T>() where T : IEncounterEvent {
+            handlers.Remove(typeof(T));
+        }
+
+        public void Resolve(IEnumerable<IEncounterEvent> events, EncounterContext context) {
+            if(events == null) {
+                return;
+            }
+
+            foreach(var evt in events) {
+                if(evt == null) {
+                    continue;
+                }
+
+                if(handlers.TryGetValue(evt.GetType(), out var handler)) {
+                    handler(evt, context);
+                }
+            }
+        }
+    }
+}