set up mono_repo configs

[jakemac53]

Closes #2

I also added tool/dart_model_generator to the workspace config.

[davidmorgan]

Neat, thanks.

dart_model_generator doesn't have any test yet, let me see if I can add a golden test... feel free to merge before, to wait, to add an empty test, or to tweak the config so it doesn't test, as you like :)

[davidmorgan]

#13 :)

[jakemac53]

cc @davidmorgan we are somehow getting carriage returns on windows, I just changed it to use equalsIgnoringWhitespace for now, which will only capture meaningful changes... but we could end up swapping between carriage returns and not, if people generate on windows versus other platforms...

[davidmorgan]

Curious, maybe add a TODO / issue somewhere? We probably don't want to accidentally publish with different line endings.