Add support for CMake's "FetchContent" submodule

[Alan-Jowett]

Is there an existing issue for this?

• I have searched the existing issues

Feature description

CMake has a "FetchContent" module that permits adding a dependency on another project.

See:
https://cmake.org/cmake/help/latest/module/FetchContent.html

It would be good to have dependabot scan for these dependencies and update them.

[kassane]

Duplicate #2027 (comment) ?

[nam20485]

+1

vcpkg is also a MS product and has broad support across multiple platforms/os's, including integrations with GitHub and Actions (i.e. GitHub Actions Cache/GitHub Packages binary caching) so it seems like it would be a really good choice of an ecosystem to add support for.