Switch INotificationManager and ITitleScreenMenu to use ISharedImmediateTexture (#1879)

* Switch INotificationManager and ITitleScreenMenu to use ISharedImmediateTexture #1879

* Remove SetIconTexture
Remove some remarks that no longer apply

* Cleanup StyleCop warnings

Dalamud/Interface/Textures/ForwardingSharedImmediateTexture.cs

@@ -0,0 +1,50 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+using Dalamud.Interface.Textures.TextureWraps;
+using Dalamud.Storage.Assets;
+
+namespace Dalamud.Interface.Textures;
+
+/// <summary>
+/// Wraps a dalamud texture allowing interoperability with certain services. Only use this if you need to provide a texture that has been created or rented as a ISharedImmediateTexture.
+/// </summary>
+public class ForwardingSharedImmediateTexture : ISharedImmediateTexture
+{
+    private readonly IDalamudTextureWrap textureWrap;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ForwardingSharedImmediateTexture"/> class.
+    /// </summary>
+    /// <param name="textureWrap">A textureWrap that has been created or provided by RentAsync.</param>
+    public ForwardingSharedImmediateTexture(IDalamudTextureWrap textureWrap)
+    {
+        this.textureWrap = textureWrap;
+    }
+
+    /// <inheritdoc/>
+    public IDalamudTextureWrap GetWrapOrEmpty()
+    {
+        return this.textureWrap;
+    }
+
+    /// <inheritdoc/>
+    public IDalamudTextureWrap? GetWrapOrDefault(IDalamudTextureWrap? defaultWrap = null)
+    {
+        return this.textureWrap;
+    }
+
+    /// <inheritdoc/>
+    public bool TryGetWrap(out IDalamudTextureWrap? texture, out Exception? exception)
+    {
+        texture = this.textureWrap;
+        exception = null;
+        return true;
+    }
+
+    /// <inheritdoc/>
+    public Task<IDalamudTextureWrap> RentAsync(CancellationToken cancellationToken = default)
+    {
+        return Task.FromResult(this.textureWrap);
+    }
+}