Remove bidirectional flag and case state from api (planning#506, planning#511)

See merge request !169

the list endpoint of cases is supposed to only hand out active cases,
not closed ones. this wasnt entirely clear before but should be now.

BiDiKo Teil 2 - The attack (planning#460)

See merge request !167

when searching for stuff in the api, we often have false-positives
using rg / ag. Since the rapidoc.js file is a distribution file, we cannot
(should not) change it anyways

when upstream updates swagger-cli to 4.0.5 this file needs to
be updated to remove the JonasGroeger/swagger-cli project.

Rückkanal Teil 1 - Preparations (planning#460)

See merge request !166

see README.md for details

the jeanberu/swagger-cli docker image is super out of date

fix:typo fixed (planning#381)

See merge request !162

feat: add CORS headers for several endpoints (planning#586)

See merge request !161

Endpoints:
  - GET /v1/destinations/{destinationId}
  - GET /v1/destinations/{destinationId}/keys/{keyId}
  - GET /v1/info
  - GET /.well-known/jwks.json

feat: removed incorrect response codes (planning#501)

See merge request !160

Rename title to "Submission API"

See merge request !159

Added missing return status code to Documentation planning#501

See merge request !158