'Project Link Code' for ease of Jury data import

[Lordfirespeed]

Jury needs access to Guilds metadata for teams.
Best way to implement this securely is to

• add a private field to devpost submission form for 'Guilds Team Link Code', the description of which provides a link to e.g. guilds.durhack.com/hacker/team/link-code
• Add page to Guilds app at the linked destination which provides a unique, stable, non-guessable piece of text (the 'team link code') that identifies the team
• Hackers should copy-paste the value from the Guilds page into their devpost
• Add /api/interop/... routes which allow Jury to fetch info about a project using its team link code
  • should provide the guild the team belongs to
  • should provide the area the team resides in