add CIs for Spearman' rho and Kendall's tau

[IndrajeetPatil]

We do this only for Pearson's. But correlation also returns CIs for these other measures that we can utilize for reporting.

[IndrajeetPatil]

This is not going to be straightforward unfortunately.

correlation works with raw data and computes correlations, while parameters works with correlation test related htest objects. We will have to implement something like cor_to_ci() in parameters itself so that the returned summary dataframes already contain confidence intervals.

[DominiqueMakowski]

I think the most straightforward way is to implement report's support for correlation objects (easycorrelation class), and then people will just have to use correlation::cor_test() or correlation::correlation() with report if they want the comprehensive report 🤷