Add Simplified Testing Setup Using Configuration File

[jrg94]

Is your feature request related to a problem? Please describe.

We talked about this in the past, but we shouldn't have to edit three different files every time we wanted to add a new project. Specifically, it would be awesome if there was a way to add testing directly into the .glotter.yml file. Then, the runner.py and individual pytest files could be generated dynamically.

Describe the solution you'd like

See above!

Describe how this would look for clients integrating with Glotter (if applicable).

projects:
    removeallwhitespace:
        words:
            - "bubble"
            - "sort"
        requires_parameters: true
        tests:
            valid:
                - nospaces:
                    input: "RemoveAllSpaces"
                    output: "RemoveAllSpaces"
            invalid:
                - noinput:
                    input: ""
                    output: "Usage: please provide a string" 

This would probably be very quickly overwhelming, so maybe a folder like tests where there is one of these for each project? In other words, keep the glotter config as-is, but repurpose the tests directory to contain only YAML files.