examples: rename main modules -> App

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

examples/sprite/App.zig

@@ -33,7 +33,7 @@ frame_render_pass: *gpu.RenderPassEncoder = undefined,
 
 // Define the globally unique name of our module. You can use any name here, but keep in mind no
 // two modules in the program can have the same name.
-pub const name = .game;
+pub const name = .app;
 pub const Mod = mach.Mod(@This());
 
 pub const global_events = .{

examples/sprite/main.zig

@@ -5,7 +5,7 @@ pub const modules = .{
     mach.Core,
     mach.gfx.Sprite,
     mach.gfx.SpritePipeline,
-    @import("Game.zig"),
+    @import("App.zig"),
 };
 
 // TODO(important): use standard entrypoint instead