add a color management page to skia.org

preview at https://skia.org/user/color?cl=279061

Change-Id: I66dd7911593fc9f8d3864f4829cc2df26923f5d8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/279061
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
2 files changed