Passwordless | `ResetPasswordEmailSentPage` and API refactors

[coldlink]

What does this change?

• Sets up an ResetPasswordEmailSentPage component that displays the correct page based on whether we're using passcodes or the legacy link method
  • If we're using passcodes, as defined by hasStateHandle variable, then we show the PasscodeEmailSent component
  • If the passcode has already been used, then we show the PasscodeUsed component
  • If we're not using passcodes, then we show the EmailSent component as previously done
• We also move challengeAuthenticatorSchema to shared/schemas.ts as it's also needed by the identifyRemediations type too
• Finally we refactor the validate<ENDPOINT>Remediation methods into a single method called validateRemediation which takes type generics
  • Anything that was previously using the full method definition can just use the types instead, e.g. for validateChallengeAnswerRemediation it becomes

export const validateChallengeAnswerRemediation = validateRemediation<
    ChallengeAnswerResponse,
    ChallengeAnswerRemediationNames
>;

instead of

export const validateChallengeAnswerRemediation = (
    challengeAnswerResponse: ChallengeAnswerResponse,
    remediationName: ChallengeAnswerRemediationNames,
) => {
    const hasRemediation = challengeAnswerResponse.remediation.value.some(
        ({ name }) => name === remediationName,
    );

    if (!hasRemediation) {
        throw new OAuthError(
            {
                error: 'invalid_request',
                error_description: `Remediation ${remediationName} not found in challenge/answer response`,
            },
            400,
        );
    }
};

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From guardian/actions-riff-raff.