scale custom emoji with mfm

src/components/status_body/status_body.scss

@@ -6,10 +6,32 @@
 
   .emoji {
     --_still_image-label-scale: 0.5;
+
     width: 50px;
     height: 50px;
   }
 
+  ._mfm_x2_ {
+    .emoji {
+      width: 100px;
+      height: 100px;
+    }
+  }
+
+  ._mfm_x3_ {
+    .emoji {
+      width: 150px;
+      height: 150px;
+    }
+  }
+
+  ._mfm_x4_ {
+    .emoji {
+      width: 200px;
+      height: 200px;
+    }
+  }
+
   .attachments {
     margin-top: 0.5em;
   }