Re-org for cleanliness and start of test projects
# Conflicts: # com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDPBRPass.template # com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDPBRSubShader.cs # com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDUnlitPassForward.template # com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDUnlitSubShader.cs