[clang-tools-extra] Add new check: do not return 0; at the end of main() in C++ (PR #77586)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

Thanks for understanding @11happy ! As you say the learning experience is invaluable and will be very useful for the next check. All contributions are greatly appreciated :)

I can recommend you look into fairly recent issues - older issues may not have been reviewed throughly or simply be forgotten.

https://github.com/llvm/llvm-project/pull/77586