Feature request: mutate for summarized result

[ablack3]

Problem:

There is often a need to modify summarizedResult objects. This would be changing existing estimates or adding new derived estimates based on the data in the summarized result. Currently this is difficult because:

1. Data is stored in rows so modifying an estimate requires targeting specific rows
2. Estimates are stored a character strings with special values like "-". Modifying them requires casting.

The tidy function is very helpful to get the summarized result into a more manageable format to modify. However it is unclear how to go from a tidy formatted result back to the summarizedResult which is needed for table and plot functions.

Possible solutions:

perhaps we can have a workflow like

summarizedResult |>
   tidy() |>
   mutate() |>
   as.summarizedResult() # some columns would be automatically treated as estimates

Or perhaps there could be a mutateEstimates function that can help with these operations.