feat(event): introduce .bell system event

src/container.zig

@@ -915,6 +915,11 @@ pub fn Container(Model: type, Event: type) type {
                     relative_mouse.y -= this.origin.y;
                     try this.element.handle(model, .{ .mouse = relative_mouse });
                 },
+                .bell => {
+                    // ring the terminal bell and do not propagate the event any further
+                    _ = try terminal.ringBell();
+                    return;
+                },
                 else => try this.element.handle(model, event),
             }
             for (this.elements.items) |*element| try element.handle(model, event);
@@ -961,6 +966,7 @@ const assert = std.debug.assert;
 const Allocator = std.mem.Allocator;
 const build_options = @import("build_options");
 const input = @import("input.zig");
+const terminal = @import("terminal.zig");
 const isTaggedUnion = @import("event.zig").isTaggedUnion;
 const Cell = @import("cell.zig");
 const Color = @import("color.zig").Color;