Add Dynamic Resource Root Signature flags

Add flag values associated with dynamics resources (ResourceDescriptorHeap and SamplerDescriptorHeap) see https://microsoft.github.io/DirectX-Specs/d3d/HLSL_SM_6_6_DynamicResources.html for details

vendor/directx/d3d12/d3d12.odin

@@ -1992,6 +1992,8 @@ ROOT_SIGNATURE_FLAG :: enum u32 {
 	LOCAL_ROOT_SIGNATURE                  = 7,
 	DENY_AMPLIFICATION_SHADER_ROOT_ACCESS = 8,
 	DENY_MESH_SHADER_ROOT_ACCESS          = 9,
+	CBV_SRV_UAV_HEAP_DIRECTLY_INDEXED     = 10,
+	SAMPLER_HEAP_DIRECTLY_INDEXED         = 11,
 }
 
 STATIC_BORDER_COLOR :: enum i32 {