Consolidate third-party plugins into Assets/Plugins

Move and consolidate many third-party plugin files and metadata from various locations (notably Assets/Third Parties/Plugins 1 and scattered Opsive/Photon folders) into a unified Assets/Plugins directory. Includes DOTween, PrimeTween, Native/BackroomsNoise, Sirenix/Odin Inspector, and Opsive UltimateCharacterController/shared libs, plus updates to several .meta files and removal of obsolete installer/legacy files. This standardizes plugin layout and cleans up duplicate/obsolete assets.

Assets/Third Parties/Opsive/UltimateCharacterController/Scripts/Traits/IInteractableTarget.cs

@@ -0,0 +1,29 @@
+/// ---------------------------------------------
+/// Ultimate Character Controller
+/// Copyright (c) Opsive. All Rights Reserved.
+/// https://www.opsive.com
+/// ---------------------------------------------
+
+namespace Opsive.UltimateCharacterController.Traits
+{
+    using UnityEngine;
+
+    /// <summary>
+    /// Interface for an object that can be interacted with (such as a platform or door).
+    /// </summary>
+    public interface IInteractableTarget
+    {
+        /// <summary>
+        /// Can the target be interacted with?
+        /// </summary>
+        /// <param name="character">The character that wants to interact with the object.</param>
+        /// <returns>True if the target can be interacted with.</returns>
+        bool CanInteract(GameObject character);
+
+        /// <summary>
+        /// Interact with the target.
+        /// </summary>
+        /// <param name="character">The character that wants to interact with the object.</param>
+        void Interact(GameObject character);
+    }
+}