Mostly workshop and slido additions/simplifications

[kweav]

I've added some functions that mostly help with the workshop graphs.

• coacross: coalesce across several columns; this function is used to get relevance rating and recommendation likelihood data for workshops

• get_to_bind: turn pre or post confidence rankings for a given workshop into ; this function isn't used at the moment, but will be for the individual workshop plot (Change in confidence for specific workshops; plot_workshop_confidence) that I've added a space for, but haven't added the data for yet.

Cleaned up data processing a bit

• itcr_slido_data_processed get's processed earlier so that everything using slido data for the workshops has the same data it's starting with.
• There was a course data sheet that was pointed to that doesn't exist anymore. I point to one that does exist and slightly change the handling of the data to match the new sheet. This change may not be permanent though since that whole tab and data handling for courses needs overhauling.

I've added or adjusted some plots or tables

• The workshop likelihood recommendation plot has been adjusted so that it uses data across workshops and not limited to a few columns/events (hence the need for the coacross function.
• plot_workshop_confidence_pooled: two boxplots showing the distribution of pre and post confidence rankings pooled across workshops (as long as the workshop was rated on a scale of 1-10).
• CRAN Package Download Totals overall and for the last 6 months
• the career stage workshop attendee type plot needed adjusted (to point to a different sheet) and I cleaned up the data processing a little bit, adding notes about what the data looks like and that it's manually curated.

I've added some footers and annotations

• percent_rec, a text output describing how many likely to recommend ratings are 8 or above
• loaded the grid package and used text grobs to annotate x-axes with most or least confident, etc.

There's still a lot to do, but this is getting pretty sizeable, so pushing it now.