Unicode plot for compositions without UnicodePlots.jl

[juliohm]

The UnicodePlots.jl has become a heavy dependency as explained here:

JuliaPlots/UnicodePlots.jl#291

Maybe we should consider copying the code for bar plots to CoDa.jl (with appropriate credits) and drop UnicodePlots.jl from our list of dependencies. I didn't have time to investigate the code yet, but it is good way forward to make this package more slim and self-contained in the future.

[juliohm]

There are too many types and hacks in UnicodePlots.jl that make it difficult to isolate the plot recipe. Therefore, I removed the dependency and added a note to the README in case someone wants to reproduce the bar plot.

[juliohm]

I will reopen the issue in case someone is willing to help with a new unicode plot that is self-contained without the UnicodePlots.jl dependency.

[juliohm]

Alternatively, we can now rely on package extensions in Julia v1.9 to load the code whenever the UnicodePlots.jl package is loaded in the same session. I don't know if it addresses the issue properly, but at least we get a nice output while a lighter approach is not proposed.