Display certification received and issued

One can take inspiration from the Cesium v1 view:

Data source for this will be the duniter-squid indexer. Two dev instances are already available:

• https://subsquid.gdev.coinduf.eu/graphql
• https://gdev-squid.axiom-team.fr/graphql

The query for that will look like:

query CertsViewQuery($identity_index: Int!) {
  identities(where: {index_eq: $identity_index}) {
    index
    name
    certIssued(orderBy: createdOn_DESC) {
      receiver {
        name
      }
      createdOn
      active
    }
    certReceived(orderBy: createdOn_DESC) {
      issuer {
        name
      }
      createdOn
      active
    }
  }
}