Document "Migrating from HLSL"#4

jkwak-work merged 5 commits intoshader-slang:mainshader-slang/shader-slang.github.io:mainfrom

jkwak-work:doc/migrating_from_hlsljkwak-work/shader-slang.github.io:doc/migrating_from_hlslCopy head branch name to clipboard