POFCC-329 - allow navigation links in the header to go to decentralised service URLs

[jamescatto-cgi]

Jira link

https://tools.hmcts.net/jira/browse/POFCC-329

Change description

Using part of the decentralise mechanism of pofcc-365 allow links in the header to open external service URLs.

The required config is:

adding a new menu item in ExUI at api/configuration/menuConfigs/base-config.ts
adding a new DECENTRALISED_SERVICE_MAP variable in config/default.json
For example in api/configuration/menuConfigs/base-config.ts:

{      
  active: false,      
  href: '/duty-advisor',      
  roles: ['caseworker-pcs-solicitor'],      
  text: 'Duty Advisor',      
  decentralisedServiceId: 'PCS',    
}, 

And in config/default.json:

"decentralisedServiceMap": {    
  "PCS": { "id": "PCS", "baseUrl": "https://www.google.com" }  
}, 

Here the decentralisedServiceId must match the key in the decentralisedServiceMap.

Dependency PRs

Testing done

Security Vulnerability Assessment

CVE Suppression: Are there any CVEs present in the codebase (either newly introduced or pre-existing) that are being intentionally suppressed or ignored by this commit?

• Yes
• No

Checklist

• commit messages are meaningful and follow good commit message guidelines
• README and other documentation has been updated / added (if needed)
• tests have been updated / new tests has been added (if needed)
• Does this PR introduce a breaking change
• Can this PR be released on a Friday (ie: no functional code changes)

[jamescatto-cgi]

should the service ID be mapped here? Is it possible to get the service ID from the user session instead to avoid hardcoding the service ID here?