Issue #29 - Show batch (i.e. stint) info after name on correct guess

[jaryncolbert]

This commit resolves #29 by adding information about a member of the RC community's stint or tenure depending on their role and the dates of their involvement.

• Batches are identified solely by their short names, e.g. m3'19 or SP1'19.
• Other roles are described as such:
  • residency: Resident
  • employment: Their title, if specified. Otherwise, Staff.
  • experimental: Experimental Batch
  • research fellowship: Research Fellow
  • facilitatorship: Facilitator
• Dates of involvement are only shown for non-batch stints and are identified by abbreviated month and year, e.g. Apr '19.
  • If they are currently involved, the date will appear as <role> since <start_date>, e.g. Facilitator since Jan '14.
  • If their involvement has ended, the date will appear as <role>, <start_date> - <end_date>, e.g. Resident, Sep '13 - Dec '13. If the start and end dates have the same abbreviation, only a single date will be shown, e.g. <role>, <start_date>, e.g. Experimental Batch, Jul '17.
• Multiple stints/roles will be separated by semi-colons and ordered by date from earliest to latest.

Screenshots -

• Multiple batches plus non-batch Facilitatorship stint with different start and end dates:
• Residency with identical start and end date abbreviations:
• Current employment with title of Career Facilitator but without end date:
• Regular plus experimental batch:

[jaryncolbert]

Would love to hear your thoughts, @botwhytho and @brainwane, since you were the original submitter and commenter on #29. But no pressure if you don't have the bandwidth to weigh in!

[jasonaowen]

This is awesome work, @jaryncolbert ! Thank you so much. It looks amazing, and you handled the edge cases really well; I really appreciate your thoroughness.

There are some opportunities to clean up the code a little bit, or places where I don't quite follow, and I've commented on them below. They're all optional, though - if you want to work on it further, I'm happy to pair on and/or review that work, and if not then please merge away!

[jasonaowen]

Now that the 'retreat' case is a simple return, I think it makes sense to merge the if statement into the switch statement, like:

switch (type) {
  case 'retreat':
    return stint.get('short_name');
  case 'residency':

[jasonaowen]

Thanks, @jaryncolbert ! 💜