fix: add newly introduced parameter for App.start function to all corresponding usages

examples/layouts/grid.zig

@@ -69,7 +69,7 @@ pub fn main() !void {
     }
     defer container.deinit(); // also de-initializes the children
 
-    try app.start();
+    try app.start(.full);
     defer app.stop() catch |err| log.err("Failed to stop application: {any}", .{err});
 
     // event loop