IBM's SMIT did this, and did this 25 years ago (although it generated shell scripts instead of Terraform/CFN/Ansible/Chef/Salt/Etc you mentioned). You could have SMIT just go ahead and do whatever, or you can have it show you the sequence of commands it would do.
And it worked both from the command line and the GUI. I can see no issues with it having a web interface as well.
It really does feel like we're slowly recreating the mainframe the hard way, doesn't it? Some day soon we'll be rewriting Terraform in LISP and running it on something that might as well be z/OS.
And it worked both from the command line and the GUI. I can see no issues with it having a web interface as well.