separate workflow into components

[bvreede]

At the moment, files get created and uploaded in the same loop as channels are created. It would be useful to separate the different elements of the workflow, so that errors in one do not cause problems for other aspects, and elements can be tested (i.e. it can be verified that they have been executed correctly).

[liekelotte]

Specifically, the stages should be:

• [x] 1. Read the Holy Excel Sheet #21
• [x] 2. Parse and process information in the sheet and select workshops #22
• [x] 3. Select workshop to prepare #32
• [x] 4. Create comms docs #20
• [ ] 5. Create eventbrite YAML #13
• [x] 6. Create sharepoint folder #23
• [x] 7. Upload comms doc of corresponding workshop to sharepoint folders #27
• [x] 8. Create data.csv and upload to sharepoint folder #27
• [x] 9. Create planning doc #20
• [x] 10. Create debriefing doc #20
• [x] 11. Create team channel #23
• [x] 12. Upload planning doc and debriefing doc to corresponding sharepoint folder #27
• [x] 13. Post a message in the channel tagging instructors and helpers #37

[bvreede]

Steps should be in three phases:

1. Check if all necessary elements for the step are present;
2. Do the step
3. Check if the step is correctly executed

[liekelotte]

for 7, 8, and 12: creating two functions: create_data_file and upload_docs. the latter will have a flexible argument indicating which docs (i.e. upload_docs(slug, comms = TRUE, debriefing = TRUE, planning = TRUE, data = TRUE))