[WIP] Try to enable alpha blending

graphics/shaders/shader.vert

@@ -7,7 +7,7 @@ layout(binding = 0) uniform UniformBufferObject {
 } ubo;
 
 layout(location = 0) in vec3 inPosition;
-layout(location = 1) in vec3 inColor;
+layout(location = 1) in vec4 inColor;
 layout(location = 2) in vec2 inTexCoord;
 
 layout(location = 3) in vec3 instancePosition;
@@ -15,7 +15,7 @@ layout(location = 4) in vec3 instanceRotation;
 layout(location = 5) in float instanceScale;
 layout(location = 6) in uint instanceTextureId;
 
-layout(location = 0) out vec3 fragColor;
+layout(location = 0) out vec4 fragColor;
 layout(location = 1) out vec2 fragTexCoord;
 layout(location = 2) out uint outInstanceTextureId;
 
@@ -66,4 +66,4 @@ void main()
     fragColor = inColor;
     fragTexCoord = inTexCoord;
     outInstanceTextureId = instanceTextureId;
-}
+}