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/pushconstants/lights.vert

@@ -1,44 +0,0 @@
-#version 450
-
-layout (location = 0) in vec3 inPos;
-layout (location = 1) in vec3 inNormal;
-layout (location = 3) in vec3 inColor;
-
-#define lightCount 6
-
-layout (binding = 0) uniform UBO 
-{
-	mat4 projection;
-	mat4 model;
-	vec4 lightColor[lightCount];
-} ubo;
-
-layout(push_constant) uniform PushConsts {
-	vec4 lightPos[lightCount];
-} pushConsts;
-
-layout (location = 0) out vec3 outNormal;
-layout (location = 2) out vec3 outColor;
-
-layout (location = 3) out vec4 outLightVec[lightCount];
-
-out gl_PerVertex
-{
-	vec4 gl_Position;
-};
-
-void main() 
-{
-	outNormal = inNormal;
-	outColor = inColor;
-	
-	gl_Position = ubo.projection * ubo.model * vec4(inPos.xyz, 1.0);
-	
-	for (int i = 0; i < lightCount; ++i)
-	{	
-		vec4 worldPos =  ubo.model * vec4(inPos.xyz, 1.0);
-		outLightVec[i].xyz = pushConsts.lightPos[i].xyz - inPos.xyz;		
-		// Store light radius in w
-		outLightVec[i].w = pushConsts.lightPos[i].w;
-	}
-}