Custom excel report

[shannonpileggi]

Closes #29 Closes #34

[shannonpileggi]

still wip

[shannonpileggi]

Notes on next to do steps:

• [x] fix R cmd check warning/notes
• [x] fix/remove documentation for dot functions in utils
• [x] fix iteration over all affirmations
• [x] merge cell for labels in 1st row of sheet?

[shannonpileggi]

Are there additional unit tests I should add?

Some assumptions I made about the excel report format that a user may want to customize - what do you think? Should I add in some flexibility in this PR, or in another issue?

1. In the first summary sheet, dropping NA columns that were not submitted as arguments to affirm_.
2. In the first summary sheet, the column ordering.
3. In all sheets, min/max defaults for column widths.
4. In all sheets, the addition of a "Notes" column (and its default column width & placement).

[shannonpileggi]

need to re-think checking on affirmation_name in excel report, doesn't allow something like this: affirmation_name = "{data_frames}{str_pad(id, width = 3, pad = '0')}"

[shannonpileggi]

need to re-think checking on affirmation_name in excel report, doesn't allow something like this: affirmation_name = "{data_frames}{str_pad(id, width = 3, pad = '0')}"

Maybe this can be a separate issue to keep things simpler.