Open API: Create City Council District Schema

[TangoYankee]

Description

Create a reusable CityCouncilDistrict schema

Acceptance criteria

• [ ] An CityCouncilDistrict schema exists under components/schemas
  • Is placed in alphabetical order within the list of schemas, as practicable
• [ ] it is of type 'object'
• [ ] it has id property:
  • type string
  • required
  • description: {helpful description}
  • pattern: regex meaning number-like with length of 1 or 2
  • example: 25

Helpful example

Borough schema

[TangoYankee]

duplicate #228