DOCS: Update InputSystemUIInputModule documentation (#2081)

Author: jfreire-unity

Packages/com.unity.inputsystem/DocCodeSamples.Tests/DocCodeSamples.asmdef

@@ -4,7 +4,9 @@
     "references": [
         "GUID:75469ad4d38634e559750d17036d5f7c"
     ],
-    "includePlatforms": [],
+    "includePlatforms": [
+        "Editor"
+    ],
     "excludePlatforms": [],
     "allowUnsafeCode": false,
     "overrideReferences": true,

Packages/com.unity.inputsystem/DocCodeSamples.Tests/InputSystemUIInputModuleAssignActionsExample.cs

@@ -0,0 +1,42 @@
+#if UNITY_INPUT_SYSTEM_ENABLE_UI
+
+using UnityEngine;
+using UnityEngine.InputSystem.UI;
+
+namespace DocCodeSamples.Tests
+{
+    internal class InputSystemUIInputModuleAssignActionsExample : MonoBehaviour
+    {
+        // Reference to the InputSystemUIInputModule component, needs to be provided in the Inspector
+        public InputSystemUIInputModule uiModule;
+
+        void Start()
+        {
+            // Assign default actions
+            AssignActions();
+        }
+
+        void AssignActions()
+        {
+            if (uiModule != null)
+                uiModule.AssignDefaultActions();
+            else
+                Debug.LogError("InputSystemUIInputModule not found.");
+        }
+
+        void UnassignActions()
+        {
+            if (uiModule != null)
+                uiModule.UnassignActions();
+            else
+                Debug.LogError("InputSystemUIInputModule not found.");
+        }
+
+        void OnDestroy()
+        {
+            // Unassign actions when the object is destroyed
+            UnassignActions();
+        }
+    }
+}
+#endif