Refactor layer selection logic for more flexibility

Updated the layer selection logic to utilize an enum, LayersSelector, which supports selecting no layers, specific layers, or all available layers. This refactor enhances code clarity and allows for more flexible layer management.

src/vulkan/utils/mod.rs

@@ -1,5 +1,5 @@
 mod layers;
-pub use layers::use_layers;
+pub use layers::{use_layers, LayersSelector};
 
 pub fn print_version(version: u32) -> String {
     format!(