Adapt Backend to new Structure of terminology_system.json

[Frontman50]

In an effort to improve the display of the terminology systems in the UI the structure of the terminology_system.json file will change, introducing translation elements for each codesystem.

• Use this pre-release for development: v3.10.0-exp-terminology-systems-2

Currently:

[
  {
    "url": "http://fhir.de/CodeSystem/bfarm/alpha-id",
    "name": "alpha-id"
  },
  {
    "url": "http://loinc.org",
    "name": "loinc.org"
  },
]

After:

[
  {
    "url": "http://fhir.de/CodeSystem/bfarm/alpha-id",
    "display": {
      "original": "Alpha-ID",
      "translations": [
        {
          "language": "en",
          "value": "Alpha-ID"
        },
        {
          "language": "de",
          "value": "Alpha-ID"
        }
      ]
    }
  },
  {
    "url": "http://loinc.org",
    "display": {
      "original": "LOINC",
      "translations": [
        {
          "language": "en",
          "value": "LOINC"
        },
        {
          "language": "de",
          "value": "LOINC"
        }
      ]
    }
  },
]

Related issues:

• fhir-ontology-generator#344
• feasibility-gui#465