Add visualization tooling / plot recipes

FluxOptTools allows visualizing loss when using Optim.jl. There's also some integration between Optim and TensorBoardLogger. Neither of these integrations can be directly used when using GalacticOptim in place of Optim. It seems like a first step would be add similar integrations / recipes for GalacticOptim.

As a first pass, I got TensorBoardLogger to plot loss with the following callback:

function make_tb_cb(name="")
    logger = TBLogger(logdir, tb_overwrite)
    function callback(p, l)
        with_logger(logger) do
            @info "$(name)" loss=l
        end
        return false
    end
    return callback
end

maxiters=100
GalacticOptim.solve(prob, Optim.BFGS(); cb=make_tb_cb("BFGS-$(maxiters)"), maxiters=maxiters)

Start by reviewing the GalacticOptim.solve callback shown in the issue, then compare the visualization integrations in FluxOptTools and TensorBoardLogger. Define which plotting recipes or integrations GalacticOptim should support and verify that loss can be visualized through the resulting interface.