Switch Config File to a format that natively handles lists

[ehennenfent]

We should strip out the configparser module and replace config.ini with a TOML/YAML/JSON file to make up for the lack of a working shlex.split on Windows. Note that we'll also need to modify the GUI so that we can add an arbitrary number of arguments from the config window.

[woodruffw]

We could probably get away with something like this (INI + JSON for some values): https://stackoverflow.com/a/9735884. That'll allow us to keep the readability and editability of our config file without introducing any new dependencies like a YAML/TOML parser.

[woodruffw]

Approached this via the idea above, and ran into some pain with marshalling the arguments from the profile creation dialog in the GUI. JSON arrays are also a hassle to edit manually, so I dropped it.

I'm going to give https://docs.microsoft.com/en-us/windows/desktop/api/shellapi/nf-shellapi-commandlinetoargvw a try via ctypes.