Add editor option for Examplar

[ds26gte]

Set up an option for Examplar called provisionally Exmplaritor (alongside Chatitor, Embeditor, Text) that will take chaffs and wheats and produce an RHS containing their individual results.

WIP in pull request https://github.com/brownplt/pyret-lang/pull/1692

Things needed to accomplish this:

• [ ] Beautify collated results
• [ ] Check that GDrive backend in anchor works (pending Joe's completion)
• [ ] exampleditor should work when given the url of a google folder, not just the fileID
• [x] Find a way to keep track of a list of implementations ("wheats and chaffs" - separate files
• [x] Generate a new program for each implementation, which includes the tests
• [x] Add runExamplarAsync() (in analogy with runProgramAsync() and runSegmentsAsync() in Chatitor).
• [x] Collect collated results from running runExamplarAsync against all of the generated programs
• [x] Add descriptive analysis to collated results ("here's how many wheats/chats you got...")
• [x] Allow for multiple examples instead of hardwiring into one directory
• [x] Hide certain files - including wheats and chaffs - from the fsbrowser window
• [x] On page load in browser, if wheats, chaffs and check-block file found in current directory, option should automatically switch to Examplaritor mode
• [x] On page load in browser, if option is pre-set to Examplaritor, but current directory structure not conducive to Examplaritor, automatically switch to Chatitor mode
• [x] Check-block file can contain include of user's own implementation of tested procedure, so it can be run by itself. When testing against wheats/chaffs this portion of the check-block file is appropriately replaced
• [x] Allow for generation of hints when wheats fail
• [x] Allow for quatermaster-styles for validity of inputs (args) and outputs (results)
• [x] Internalize how things get updates on pyret-lang and code.pyret.org, all the way to release
• [x] Determine reliable way to use cpo/lists/etc libraries in assignments. May need to also modify implementation of these libraries in pyret-lang#anchor repo. But they should continue to work when released via c.p.o.
• [ ] Confirm legacy assignment Fact (with hints)
• [ ] Confirm legacy assignment Docdiff
• [ ] Confirm legacy assignment Filesystem
• [ ] Confirm legacy assignment Median (with QtM)
• [ ] Confirm legacy assignment Nile
• [ ] Confirm legacy assignment Sortacle
• [ ] Confirm legacy assignment Updater
• [ ] Other legacy assignments after ironing out the kinks in the above

More details at https://github.com/ds26gte/examplar-assignments

[schanzer]

@ds26gte IIRC, you had a google doc or something with a list of all the library issues that need to be ironed out. Could you add a link to it from the relevant checkbox above? Or perhaps that could be converted into a sub-issue, making the library checklist easier to track?