Added an example of using action markup processing to make inline events

Samples~/3D Samples/InlineEvents/EmotionEvent.cs

@@ -0,0 +1,86 @@
+using System.Threading;
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+using Yarn.Markup;
+using Yarn.Unity;
+
+public class EmotionEvent : ActionMarkupHandler
+{
+    private Yarn.Unity.Samples.SimpleCharacterAnimation target;
+    Dictionary<int, string> emotions;
+
+    public override void OnLineDisplayComplete()
+    {
+        return;
+    }
+
+    public override void OnLineDisplayBegin(MarkupParseResult line, TMP_Text text)
+    {
+        return;
+    }
+
+    public override void OnPrepareForLine(MarkupParseResult line, TMP_Text text)
+    {
+        // grab the character attribute
+        // grab the SimpleCharacterAnimation that matches that name
+        if (!line.TryGetAttributeWithName("character", out var character))
+        {
+            Debug.LogWarning("line has no character");
+            return;
+        }
+        // we need the name of the character so we can find them in the scene
+        if (!character.Properties.TryGetValue("name", out var name))
+        {
+            Debug.LogWarning("character has no name");
+            return;
+        }
+
+        var emoter = GameObject.Find(name.StringValue);
+        if (emoter == null)
+        {
+            Debug.LogWarning($"scene has no one called {name.StringValue}");
+            return;
+        }
+
+        target = emoter.GetComponent<Yarn.Unity.Samples.SimpleCharacterAnimation>();
+        if (target == null)
+        {
+            Debug.Log($"{name.StringValue} is not a SimpleCharacterAnimation");
+            return;
+        }
+
+        Debug.Log($"found a valid target, {name.StringValue}");
+
+        emotions = new();
+
+        foreach (var attribute in line.Attributes)
+        {
+            if (attribute.Name != "emotion")
+            {
+                continue;
+            }
+
+            if (!attribute.TryGetProperty("emotion", out var emotionKey))
+            {
+                continue;
+            }
+            emotions[attribute.Position] = emotionKey.StringValue;
+        }
+    }
+
+    public override YarnTask OnCharacterWillAppear(int currentCharacterIndex, MarkupParseResult line, CancellationToken cancellationToken)
+    {
+        if (target == null)
+        {
+            return YarnTask.CompletedTask;
+        }
+
+        if (emotions.TryGetValue(currentCharacterIndex, out var emotion))
+        {
+            target.SetFacialExpression(emotion);
+        }
+
+        return YarnTask.CompletedTask;
+    }
+}