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/deferred/deferred.frag

@@ -1,72 +0,0 @@
-#version 450
-
-layout (binding = 1) uniform sampler2D samplerposition;
-layout (binding = 2) uniform sampler2D samplerNormal;
-layout (binding = 3) uniform sampler2D samplerAlbedo;
-
-layout (location = 0) in vec2 inUV;
-
-layout (location = 0) out vec4 outFragcolor;
-
-struct Light {
-	vec4 position;
-	vec3 color;
-	float radius;
-};
-
-layout (binding = 4) uniform UBO 
-{
-	Light lights[6];
-	vec4 viewPos;
-} ubo;
-
-
-void main() 
-{
-	// Get G-Buffer values
-	vec3 fragPos = texture(samplerposition, inUV).rgb;
-	vec3 normal = texture(samplerNormal, inUV).rgb;
-	vec4 albedo = texture(samplerAlbedo, inUV);
-	
-	#define lightCount 6
-	#define ambient 0.0
-	
-	// Ambient part
-	vec3 fragcolor  = albedo.rgb * ambient;
-	
-	for(int i = 0; i < lightCount; ++i)
-	{
-		// Vector to light
-		vec3 L = ubo.lights[i].position.xyz - fragPos;
-		// Distance from light to fragment position
-		float dist = length(L);
-
-		// Viewer to fragment
-		vec3 V = ubo.viewPos.xyz - fragPos;
-		V = normalize(V);
-		
-		//if(dist < ubo.lights[i].radius)
-		{
-			// Light to fragment
-			L = normalize(L);
-
-			// Attenuation
-			float atten = ubo.lights[i].radius / (pow(dist, 2.0) + 1.0);
-
-			// Diffuse part
-			vec3 N = normalize(normal);
-			float NdotL = max(0.0, dot(N, L));
-			vec3 diff = ubo.lights[i].color * albedo.rgb * NdotL * atten;
-
-			// Specular part
-			// Specular map values are stored in alpha of albedo mrt
-			vec3 R = reflect(-L, N);
-			float NdotR = max(0.0, dot(R, V));
-			vec3 spec = ubo.lights[i].color * albedo.a * pow(NdotR, 16.0) * atten;
-
-			fragcolor += diff + spec;	
-		}	
-	}    	
-   
-  outFragcolor = vec4(fragcolor, 1.0);	
-}