fix: make viewer visible by default

Plugin.cs

@@ -12,7 +12,6 @@ using FFXIVClientStructs.FFXIV.Client.UI;
 using Newtonsoft.Json;
 using Screenie.Ui;
 using WebP.Net;
-using WebPDotNet;
 
 namespace Screenie;
 

Ui/Viewer.cs

@@ -13,7 +13,7 @@ internal class Viewer : IDrawable {
     private IDalamudTextureWrap? Image { get; set; }
     private Exception? Error { get; set; }
     private bool _disposed;
-    private bool _visible;
+    private bool _visible = true;
     internal string ImagePath { get; }
     internal Vector2? DotPosition { get; set; }
 
@@ -105,4 +105,4 @@ internal class Viewer : IDrawable {
 
         return DrawStatus.Continuing;
     }
-}
+}