A more chatty, more friendly Oceananigans

[glwagner]

Sometimes precompilation and model setup tasks can take a fair amount of time. This can lead to head-scratching and/or boredom while running scripts: what is Oceananigans up to, anyways?

To solve this problem and make Oceananigans more friendly and more chatty, we might add some helpful @info messages that print at various stages in the model setup process.

Looking at the examples gives a helpful overview of model setup. Here's some things we might consider info statements for:

1. Grid creation (type, size, topology, domain)
2. Boundary conditions (type and non-default boundary conditions)
3. Model creation (grid info including size and halo regions, and maybe just display model properties)
4. set!(model, ...)?
5. Simulation construction (stop criteria, time-step...)
6. run! initialization (diagnostics, output writers)
7. run! completion?

[glwagner]

Should we define new log levels for this purpose? It's less committing to add "maor logging" when they can be turned off. For example we can have a MODEL (or SETUP) level, and maybe a SIMULATION level...

[tomchor]

(Sorry, I accidentally unpinned this issue but just re-pinned it)

[glwagner]

Simulation is pretty chatty now so I think we can close this.