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/pbrbasic/pbr.vert

@@ -1,32 +0,0 @@
-#version 450
-
-layout (location = 0) in vec3 inPos;
-layout (location = 1) in vec3 inNormal;
-
-layout (binding = 0) uniform UBO 
-{
-	mat4 projection;
-	mat4 model;
-	mat4 view;
-	vec3 camPos;
-} ubo;
-
-layout (location = 0) out vec3 outWorldPos;
-layout (location = 1) out vec3 outNormal;
-
-layout(push_constant) uniform PushConsts {
-	vec3 objPos;
-} pushConsts;
-
-out gl_PerVertex 
-{
-	vec4 gl_Position;
-};
-
-void main() 
-{
-	vec3 locPos = vec3(ubo.model * vec4(inPos, 1.0));
-	outWorldPos = locPos + pushConsts.objPos;
-	outNormal = mat3(ubo.model) * inNormal;
-	gl_Position =  ubo.projection * ubo.view * vec4(outWorldPos, 1.0);
-}