Add madamiru to project showcase

Author: hecrj

static/showcase/madamiru.gif

@@ -167,6 +167,13 @@ <h1><a href="#showcase" class="secondary">#</a> Showcase</h1>
                 "thumbnail": "showcase/neothesia.gif",
                 "has_webp": false,
             },
+            {
+                "name": "Madamiru",
+                "description": "A cross-platform media player that can dynamically shuffle multiple media in a grid layout.",
+                "website": "https://github.com/mtkennerly/madamiru",
+                "thumbnail": "showcase/madamiru.gif",
+                "has_webp": false,
+            },
             {
                 "name": "Halo",
                 "description": "A program for editing .wgsl shaders in real time!",