Handle subdivision jurisdiction.code values

[kd-ods]

Describe the bug
The jurisdiction.code value is 'The 2-letter country code (ISO 3166-1) or the subdivision code (ISO 3166-2) for the jurisdiction.'

At the moment, the tool only handles 2-letter values, rendering the appropriate flag.

(Subdivision codes are the 2-letter country code followed by a hyphen, followed by up to 3 characters. See wikipedia entry)

To Reproduce
Steps to reproduce the behavior:

1. Go to the hosted visualiser
2. Paste in:

[
  {
    "statementId": "cef8c97f-deff-5474-420f-d73d0b00c333",
    "declarationSubject": "XI-LEI-1XLP8EP6FZUGMP85CM51",
    "statementDate": "2024-06-06",
    "recordId": "XI-LEI-1XLP8EP6FZUGMP85CM51",
    "recordStatus": "new",
    "recordType": "entity",
    "recordDetails": {
      "isComponent": false,
      "entityType": {
        "type": "registeredEntity",
        "details": "Corporation"
      },
      "name": "AIR PRODUCTS MANUFACTURING CORPORATION",
      "alternateNames": [],
      "jurisdiction": {
        "name": "Delaware, United States",
        "code": "US-DE"
      }
    }
  }
]

4. Click 'Draw'
5. Notice that no flag icon appears

Expected behaviour

The US flag should appear on the node, as it should do for any jurisdcition.code value of 'US-??'. (In the pasted in JSON, replace "code": "US-DE" with "code": "US" & click 'draw' to see what is expected. )