Globalize textures, materials and gui

src/engine/Skybox.zig

@@ -30,12 +30,12 @@ pipeline: vk.Pipeline,
 
 pub fn load(
     filename: []const u8,
-    stbi: *media.stbi,
     cube_size: u32,
     global_uniforms_buffer: vk.Buffer,
 ) !Skybox {
     const allocator_frame = ctx.allocator_frame;
     const io = ctx.io;
+    const stbi = ctx.stbi;
     const engine = ctx.engine;
     const swapchain = ctx.swapchain;