Opening msys2 shell using the created shortcut does not honour `/x/ghcup/env`

• The env is sourced in ~/.bashrc but the shortcut (the standard way to opn it: X:\ghcup\msys64\msys2_shell.cmd -mingw64) uses ~/.bash_profile (see https://superuser.com/questions/405342/mingw-bash-profile)
• So creating ~/.bash_profile with if [ -f ~/.bashrc ]; then . ~/.bashrc; fi makes it work (and cabal, ghc and friends are in path as expected)
• Should ghcup create such a file? If that is not the case we should document it