add interpolation data to response if returnDetails is true

[jedlikowski]

Fixes #2046

What was changed?

1. Added a new field (usedParams) to the object returned from t() when returnDetails = true. It should contain all the fields passed to interpolation.

Checklist

• only relevant code is changed (make a diff before you submit the PR)
• run tests npm run test
• tests are included
• commit message and code follows the Developer's Certification of Origin

[coveralls]

coverage: 92.171% (-0.2%) from 92.37% when pulling 857b6f9 on jedlikowski:feature/add-interpolation-data-to-details-response into f6aea8d on i18next:master.

[adrai]

included in v23.6.0
thank you for your contribution ;-)

[jedlikowski]

@adrai Could you add hacktoberfest label to this PR so that it's picked up by my company's event dashboard? It recognizes PRs and repos labeled for hacktoberfest 😄

[adrai]

done ;-)

[jedlikowski]

Thank you 👍 🎉