embed the simple shader

src/render/lines.rs

@@ -57,10 +57,9 @@ impl Pipeline {
 			mapped_at_creation: false,
 		});
 
-		let shader = std::fs::read_to_string("shaders/line.wgsl").unwrap();
 		let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
 			label: None,
-			source: wgpu::ShaderSource::Wgsl(shader.into()),
+			source: wgpu::ShaderSource::Wgsl(super::SIMPLE_SHADER.into()),
 		});
 		let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
 			label: None,

src/render/mod.rs

@@ -1 +1,3 @@
 pub mod lines;
+
+static SIMPLE_SHADER: &str = include_str!("simple.wgsl");