Handle loading error and placeholder shaders

GlitchyEditor/resources/Shaders/PlaceholderLoading.fx

@@ -0,0 +1,28 @@
+#include "GlitchyEngine.hlsl"
+
+struct VS_IN
+{
+	float3 Position : POSITION;
+};
+
+struct PS_IN
+{
+	float4 Position : SV_POSITION;
+};
+
+PS_IN VS(VS_IN input)
+{
+	PS_IN output;
+
+	float4 worldPosition = mul(Transform, float4(input.Position, 1));
+	output.Position = mul(ViewProjection, worldPosition);
+
+	return output;
+}
+
+float4 PS(PS_IN input) : SV_TARGET
+{
+	return float4(0, 1, 1, 1);
+}
+
+#pragma Effect[VS = VS; PS = PS]