move mach.Atlas -> mach.gfx.Atlas

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

src/gfx/main.zig

@@ -1,5 +1,6 @@
 pub const util = @import("util.zig");
 pub const Sprite = @import("Sprite.zig");
+pub const Atlas = @import("atlas/Atlas.zig");
 pub const Text = @import("Text.zig");
 pub const FontRenderer = @import("font.zig").FontRenderer;
 pub const RGBA32 = @import("font.zig").RGBA32;

src/main.zig

@@ -9,7 +9,6 @@ pub const ecs = @import("mach-ecs");
 pub const sysaudio = @import("mach-sysaudio");
 
 // Mach standard library
-pub const Atlas = @import("atlas/Atlas.zig");
 pub const gfx = @import("gfx/main.zig");
 pub const math = @import("math/main.zig");
 pub const testing = @import("testing.zig");