added encounter system

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

@@ -0,0 +1,21 @@
+using System;
+using UnityEngine;
+
+namespace Jovian.EncounterSystem {
+    /// <summary>Looks up <see cref="id"/> in the library passed to <see cref="Resolve"/>; falls back to <see cref="inlineText"/>.</summary>
+    [Serializable]
+    public struct DialogLineRef {
+        public string id;
+        [TextArea(2, 6)] public string inlineText;
+
+        public string Resolve(DialogLineLibrary library) {
+            if(library != null && !string.IsNullOrEmpty(id)) {
+                var text = library.Resolve(id);
+                if(!string.IsNullOrEmpty(text)) {
+                    return text;
+                }
+            }
+            return inlineText;
+        }
+    }
+}