Add badges routes

[vgeorge]

What I am changing

API routes for managing and fetching organization badges.

How I did it

This is WIP. To do list:

• Badges spec
• Badges migration
• POST /badge
• PUT /badge
• DELETE /badge
• POST /user/:id/badge
• PUT /user/:id/badge
• DELETE /user/:id/badge

Other notable changes introduced:

• Schema validation with Yup
• All tables are dropped at spec start, for two reasons:
  • Rolling back after the spec might not happen and break next spec run
  • In case test fails, data will be still available in test-db for inspection

How you can test it

Running tests, doc review.

Related Issues

• Improvements of User Badges #240

[vgeorge]

@kamicut this is ready for review. I suggest looking into badges spec file, which should cover testing all added routes.