Move shaders into glsl and hlsl directories

Move `data/shaders` to `data/shaders/glsl`
Move `data/hlsl` to `data/shaders/hlsl`

Fix up shader paths in the cpp files to point to the new glsl location.

`data/shaders/hlsl/compile.py` still overwrites the glsl .spv files (for
now).

Issue: #723

data/shaders/pushdescriptors/cube.vert

@@ -1,31 +0,0 @@
-#version 450
-
-layout (location = 0) in vec3 inPos;
-layout (location = 1) in vec3 inNormal;
-layout (location = 2) in vec2 inUV;
-layout (location = 3) in vec3 inColor;
-
-layout (set = 0, binding = 0) uniform UBOScene {
-	mat4 projection;
-	mat4 view;
-} uboCamera;
-
-layout (set = 0, binding = 1) uniform UBOModel {
-	mat4 local;
-} uboModel;
-
-layout (location = 0) out vec3 outNormal;
-layout (location = 1) out vec3 outColor;
-layout (location = 2) out vec2 outUV;
-
-out gl_PerVertex {
-	vec4 gl_Position;
-};
-
-void main() 
-{
-	outNormal = inNormal;
-	outColor = inColor;
-	outUV = inUV;
-	gl_Position = uboCamera.projection * uboCamera.view * uboModel.local * vec4(inPos.xyz, 1.0);
-}