Add IWYU builders to CI
Add IWYU (include-what-you-use) builders to gitlab-ci. Looks like it is similar to clang-tidy and involves a CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE variable to set the property on targets.
There is support for a "mapping file" that CMake has here. Not sure how much SMTK will need it.
To upload designs, you'll need to enable LFS. More information