Add issue properties

curl --request POST \
  --url https://api.plane.so/api/v1/workspaces/{workspace-slug}/projects/{project_id}/issue-types/{type_id}/issue-properties/ \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "display_name": "<string>",
  "description": "<string>",
  "property_type": "<string>",
  "relation_type": "<string>",
  "default_value": [
    "<string>"
  ],
  "validation_rules": {},
  "is_required": true,
  "is_active": true,
  "is_multi": true
}'