allow creating scenes and setting scene visibility to players

src/api/mod.rs

@@ -48,6 +48,17 @@ pub enum Request {
         amount: usize,
     },
     // Map requests
+    CreateScene {
+        title: String,
+    },
+    SceneSetGrid {
+        grid_cell_size: f32,
+        grid_offset: [f32; 2],
+    },
+    SceneSetVisible {
+        scene: usize,
+        visible: bool,
+    },
     GetScene {
         id: usize,
     },