feat: add localized development frames for package covers

tests/DevelopmentFrameTests.cs

@@ -0,0 +1,32 @@
+namespace Cthangover.Mods.Interface.Theming.Tests
+{
+    using Cthangover.Core.Mods.Testing;
+    using Godot;
+
+    /// <summary>Checks the real shared prefab and decoded alpha, including the release version without an overlay.</summary>
+    public class DevelopmentFrameTests
+    {
+        [ModTest("covers/development_frame")]
+        static void DevelopmentFrame(ModTestContext ctx)
+        {
+            var frame = UiKit.DevelopmentFrame("0.1.0");
+            var release = UiKit.DevelopmentFrame("1.0.0");
+            try
+            {
+                ModAssert.True(frame.Visible, "zero major is marked");
+                ModAssert.False(release.Visible, "released package is unmarked");
+                ModAssert.Equal((int)Control.MouseFilterEnum.Ignore, (int)frame.MouseFilter, "frame does not intercept cover clicks");
+                var texture = ((TextureRect)frame).Texture;
+                ModAssert.True(texture != null, "generated texture resolves through the mod provider");
+                using var image = texture.GetImage();
+                ModAssert.True(image.GetPixel(image.GetWidth() / 2, image.GetHeight() / 2).A == 0, "centre leaves the game art visible");
+                ModAssert.True(image.GetPixel(image.GetWidth() / 2, 4).A > 0.9f, "hazard tape is visible");
+            }
+            finally
+            {
+                frame.Free();
+                release.Free();
+            }
+        }
+    }
+}