Print Task Schedule

[kbknapp]

(Side Note, sorry for all the issues I'm submitting...I"m in the middle of refactoring a large number of Toastfiles so it's on my mind :smile: I'm also a big fan of Toast!)

Description

Add the ability to print out the task schedule in order.

Alternatives considered

None

Additional context

While doing some larger refactoring of my toastfiles I found myself working through the dependencies of my tasks to make sure the order of execution came out right, and thus shared layers between the various components. The only way I could do this was to run trough the toastfile though by actually running the tasks.

Adding a simple --print-schedule would solve this and allow one to work through the order and ensure dependencies are correct before running the tasks.

I have a working implementation of this read for a PR if interested.

[stepchowfun]

I can see how this would be useful for you, though I have similar thoughts as in https://github.com/stepchowfun/toast/issues/389#issuecomment-923594327. These "inessential" features are starting to pile up, and Toast is already getting too complicated in my opinion. So each new feature needs to be sufficiently justified. I don't have a good sense of how broadly useful this would be to Toast users in general.

For now, I will leave this issue open for further discussion.