HDPI-3566-situation-interstitial-dependants-pages

[AlexBuzea]

Jira link

See HDPI-3566

Change description

-added three pages: situation interstitial, dependant children, other dependants
-refactored repayments agreed placeholder page slightly to add radio buttons and routing to situation-interstitial based on 'Yes' or 'I'm not sure' answers (full implementation for repayments agreed done in #924)
-moved Yes/No/I'm not sure type options to the common translations for reusability

Testing done

-tested locally and all working as expected

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

[arun-hmcts]

Minor: Could you have method and use it here in to have more cleaner and easy to read please

[AlexBuzea]

@arun-hmcts Good spot, though I think this is a slightly different case, the condition is already a one-liner and unlike a function like isRentArrearsClaim, there's no real logic to encapsulate, just a value check. I've kept it inline as it follows the expected pattern for simple conditions like this.

[AlexBuzea]

@arun-hmcts I've removed the types for the unused parameters so it doesn't spread over so many lines because of the linter e.g.
{ condition: async (_req, _formData, currentStepData: Record<string, unknown>) => currentStepData?.repaymentsAgreed === 'yes' || currentStepData?.repaymentsAgreed === 'imNotSure', nextStep: 'your-household-and-circumstances', },