feat(Renderer): update interface functions to start supporting buffered rendering

src/layout.zig

@@ -1,5 +1,5 @@
 //! Dynamic dispatch for layout implementations.
-//! Each layout should at last implement these functions:
+//! Each layout should at least implement these functions:
 //! - handle(this: *@This(), event: Event) anyerror!*std.ArrayList(Event) {}
 //! - render(this: *@This(), renderer: *Renderer) anyerror!void {}
 //! - deinit(this: *@This()) void {}