[Datahub] Add service metadata support

[AlitaBernachot]

Description

This PR completes the support of Service metadata for gn4 (read), iso19139 (read/write) and iso19115-3 (read-write).

Some fixtures were added:

• Wallonia record (xml and record result) for gn4 and iso19139 unit tests, based on original data: https://metawal.wallonie.be/geonetwork/srv/api/records/fe1c1a3d-c75b-435c-a1d1-48426818f54d/formatters/xml
• Geo2france record (xml and record result) for gn4 and iso19115-3 unit tests, based on original data: https://www.geo2france.fr/geonetwork/srv/api/records/be052079-f1f6-4f6f-a722-cbf11deb40eb/formatters/xml

Architectural changes

The ServiceRecord Metadata Model has a new spatialExtents proprety (like DatasetRecord):

export interface ServiceRecord extends BaseRecord {
  kind: 'service'
  onlineResources: Array<ServiceOnlineResource>
  spatialExtents: Array<DatasetSpatialExtent>
}

Quality Assurance Checklist

• Commit history is devoid of any merge commits and readable to facilitate reviews
• If new logic ⚙️ is introduced: unit tests were added
• If new user stories 🤏 are introduced: E2E tests were added
• If new UI components 🕹️ are introduced: corresponding stories in Storybook were created
• If breaking changes 🪚 are introduced: add the breaking change label
• If bugs 🐞 are fixed: add the backport <release branch> label
• The documentation website 📚 has received the love it deserves

[github-actions]

Affected libs: api-metadata-converter,
Affected apps: metadata-converter,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[github-actions]

📷 Screenshots are here!

[jahow]

Well, that looks great, thank you!! well done 🙂

I'm approving but it seems that some tests are still failing so we'll have to fix those first

[jahow]

I know this sounds counter-intuitive but you should use the atomic operations here:

selectField(
  getFirstValue(selectField(source, 'resourceType')),
  'key'
)

This is because the documents coming from ES can sometimes have various shapes and atomic operations functions will be tolerant to nullish/unexpected values :)

[AlitaBernachot]

Thanks for the suggestion!

[coveralls]

coverage: 84.193% (-0.4%) from 84.623%
when pulling c204243 on GSIGNGPF-50-service-metadata-support
into 166506d on main.