[Feature Request] Implement count transfromations for plotting abundances

[xec-cm]

Is the feature request related to a problem?

The graphs that represent abundances (output of the abundance_ply() function) do so using raw counts and it is not always the best solution.

Describe the solution

Add a new function parameter called transform that is used internally to transform the counts of the phyloseq object saved in the recipe. The transformation can be done using the microbiome::transfrom() function.

Describe any alternatives considered

n/a

Additional context

https://github.com/microbiome/microbiome
https://www.bioconductor.org/packages/release/bioc/html/microbiome.html