Simple GUI frontend for commandline programs

There is many command line apps, which while is nice to use when creating batch scripts... is annoying to use for daily stuff. Especially when you haven't use such a program in a while, so you have to relearn how to craft the right command line commands/switches/filepaths (stuffing up a few times before getting it right).

I understand why most coders just frankly don't do GUI for these super useful tools. GUIs are bloody annoying to code.

E.g. diff-pdf is a command line program that accepts 2 pdf filepath, and compaires it visually. Very useful... except you have to hunt the filepath for both pdfs... not very fun in windows. So i created a basic python script that uses tkinter to bring up two file browser prompt to make life easier.

What I really would like to see, is some way to quickly write up a minimal gui for any command line programs.

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## About ##
All comment will actually be displayed to the user etc, and should be rendered in markdown, could perhaps store the entire helpfile like this

INTERFACE SPEC:
---------------------
option1 = select{
'a' : # this comment will explains what option a is on hover
'b' : # what this option does
'c' : # and what this option does as well
}
option2 = range: 4 --> 9 # Comments about this argument
file = filepathbrowser: '*.pdf' # Maybe comment that only .pdf is accepted

run <-- helloworld.exe [--option1] [--option2] ((file))

------------

result --> { # Could be regex matched perhaps
0 : # Program exited without error
-1 : # error somewhere....
"hello world" : # All good
}

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Where the above is rendered as a simple GUI, with two optional select and range arguments, as well as a mandatory filepath

The above is just a quick illustration of the concept, and is not how the coding should actually look like. If anything, I would envision it to be more like making a HTML page.

The idea is that this is both an 'instant GUI interface' as well as a 'help file', e.g. can have extra tabs that serves as documention for the commandline program.

In fact, if possible, the whole 'GUI helper code' should be as human readable to a non coder as possible.