persistent homology engine deployment

[corybrunson]

The package needs to deploy PH engines in as similar a way as possible to {ggtda}. The syntax should be decided and harmonized before either package is submitted to CRAN. Engine deployment may eventually be passed to a mutual dependency, to make it easier to update in response to engine changes and to incorporate into other packages.

Parameters to include:

• filtration = NULL (can be set to "vietoris", "rips", "alpha", or "cubical"; if NULL, default is selected based on data format (which for simplicity and to incentivize good practice should be applied uniformly within each list column)
• engine = c("ripserr", "TDA")
• library specification in {TDA}: maybe library = NULL (with default based on filtration), or maybe part of options = list(...)

[corybrunson]

@jamesotto852 please let me know if you have additional thoughts. I'm leaning toward the syntax already established in {ggtda}.

[corybrunson]

This comment was reposted as issue #2.