[FR] set CMAKE_CXX_CLANG_TIDY automatically

CMake supports clang-tidy (and has for a while): https://ortogonal.github.io/cmake-clang-tidy/

We probably need to set those properties in our toolchain/hooks so that CMake uses our clang-tidy instead of the host's.

Start by locating the repository's CMake toolchain and hooks, then review how CMake exposes clang-tidy properties. Confirm how the project's clang-tidy should be selected instead of the host's executable. Done means CMake automatically uses the project's clang-tidy through those toolchain or hook settings.

Written by the indexing model from the issue text.