Add Seed data to Load Relations and Related Identifiers
user
```ruby
require 'open-uri'
require 'active_record/fixtures'

related_identifier_types = [
  [ "DOI" ]
  [ "URL" ]
  [" arXiv "]
  [" PMID "]
  [" ARK "]
  [" Handle "]
  [" ISBN "]
  [" ISTC"]
  [" LISSN "]
  [" LSID"]
  [" PURL "]
  [" URN "]
]

related_identifier_types.each do |related_identifier_type|
  StashDatacite::RelatedIdentifierType.create( related_identifier_type: related_identifier_type )
end


relation_types = [
  [ " Cites" ]
  [ " isCitedBy" ]
  [ " Supplements" ]
  [ " IsSupplementedBy" ]
  [ " IsNewVersionOf" ]
  [ " IsPreviousVersionOf" ]
  [ " Continues" ]
  [ " IsContinuedBy" ]
  [ " IsPartOf" ]
  [ " HasPart" ]
  [ " IsDocumentedBy" ]
  [ " Documents" ]
  [ " IsIdenticalTo" ]
  [ " IsDerivedFrom" ]
  [ " IsSourceOf" ]
]

relation_types.each do |relation_type|
  StashDatacite::RelationType.create( relation_type: relation_type )
end```
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