CMake build database

[rdong8]

Don't know much about this feature, sounds like it could replace compile_commands.json?

https://cmake.org/cmake/help/latest/variable/CMAKE_EXPORT_BUILD_DATABASE.html

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2977r2.html

[rdong8]

Enabled it but still not sure what actually uses this