Add basic flow and flowObject information to graphql

[czmj]

EDITED

This PR add not only the SearchFlow resolver for GraphQL but also add lots of the nested relations with flow and flowObject.
This means that this PR include services and resolver for entities like: emergency, organisations, plans, clusters, etc.

Maybe the correct approach with this PR is to splice it up into smaller PRs or review Clara's commits individually (as was requested previously) and then review the new parts introduced this month.

---

ORIGINAL

Adds flow query with data on a specified flow (by id), along with flowObjects grouped by refDirection and objectType

Example query:

{
  flow(id: 14) {
    id
    versionID
    flowDate
    decisionDate
    firstReportedDate
    budgetYear
    origAmount
    origCurrency
    exchangeRate
    activeStatus
    newMoney
    restricted
    description
    notes
    versionStartDate
    versionEndDate
    createdBy
    lastUpdatedBy
    createdAt
    updatedAt
    deletedAt    
    flowObjects {
      source {
        organizations {
          id
          name
        }
      }
      destination {
        organizations {
          id
          name
        }
      }
    }
  }
}

A lot of this PR is doing the same thing for each object type - it might be easier to review each commit as the later ones are largely copy and paste

[unocha-hpc]

Checks have passed and this pull request is ready for manual review

[unocha-hpc]

Checks have passed and this pull request is ready for manual review

[unocha-hpc]

Checks have passed and this pull request is ready for manual review

[unocha-hpc]

Checks have passed and this pull request is ready for manual review