Make Keyboard a toplevel struct

src/keyboard.zig

@@ -1,12 +1,12 @@
+const Self = @This();
+
 const std = @import("std");
+
 const c = @import("c.zig");
 
 const Log = @import("log.zig").Log;
 const Seat = @import("seat.zig");
 
-pub const Keyboard = struct {
-    const Self = @This();
-
 seat: *Seat,
 wlr_input_device: *c.wlr_input_device,
 wlr_keyboard: *c.wlr_keyboard,
@@ -161,4 +161,3 @@ pub const Keyboard = struct {
     }
     return false;
 }
-};

src/seat.zig

@@ -5,7 +5,7 @@ const std = @import("std");
 
 const Cursor = @import("cursor.zig");
 const InputManager = @import("input_manager.zig");
-const Keyboard = @import("keyboard.zig").Keyboard;
+const Keyboard = @import("keyboard.zig");
 const LayerSurface = @import("layer_surface.zig");
 const Output = @import("output.zig");
 const View = @import("view.zig");