Fix static array. Add constant buffers. Beginning of textures.

test/texture_sample.shd

@@ -0,0 +1,23 @@
+p :: properties {
+	texture : texture2D;
+	sampler : sampler;
+}
+
+PS_Input :: struct {
+	uv  : float2 @uv;
+	pos : float4 @position;
+}
+
+vertex main :: (pos : float4 @position, uv : float2 @uv) -> PS_Input {
+	result : PS_Input;
+
+	result.uv = uv;
+	result.pos = pos;
+
+	return result;
+}
+
+pixel main :: (input : PS_Input) -> float4 @target {
+	color : float4 = sample(p.texture, input.uv, p.sampler);
+	return color;
+}