Track progress of training loop

[elisno]

(Paraphrased) The train! statement in the README.md example runs in rougly 7.5 minutes on my machine. I forgot that steps=300 by default.

• [ ] Add a @progress macro from ProgressLogging.jl to the training loop in train!.
• [ ] Add training loop tracker via callback (cb) as a kwarg to train!.

_Originally posted by @elisno in https://github.com/SciML/QuantumNLDiffEq.jl/pull/1#discussion_r835907856_

[VarLad]

@elisno I'm considering https://github.com/JuliaLogging/ProgressLogging.jl by the way, and use it locally :)

Since ProgressLogging is compatible with Pluto notebooks to some degree as well

[elisno]

@elisno I'm considering https://github.com/JuliaLogging/ProgressLogging.jl by the way, and use it locally :)

Since ProgressLogging is compatible with Pluto notebooks to some degree as well

That could work as well. I've updated the task list to reflect this.

[elisno]

I've reformatted the task list. The tasks can be converted into separate issues (by a maintainer).