[flang-commits] [flang] [Flang] Add a Fortran Standards Support doc (PR #132195)

[Damian Rouson via flang-commits]

rouson wrote:

 > I guess we should see if we can get a list of updates from J3/WG5 for 2018 and 2023 Fortran to populate the list. We also should list intrinsic functions explicitly if there are supported (or not).

@mjklemm the list of changes is in the Introduction to the [Fortran 2023 Interpretation Document](https://j3-fortran.org/doc/year/24/24-007.pdf).

https://github.com/llvm/llvm-project/pull/132195