[clang] [LifetimeSafety] Add user documentation (PR #183058)

[Utkarsh Saxena via cfe-commits]

https://github.com/usx95 ready_for_review 
https://github.com/llvm/llvm-project/pull/183058
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits