Returns the forms of the authenticated client with minimal fields per item.
Use the GET /newsletter/{newsletterId}/form/{formId} endpoint to retrieve
the full details of a form (including the form URL and embed code).

Provide the optional newsletterId query parameter to list only the forms
of a specific subscriber list.

Pagination

Results are paginated with the limit and page query parameters. Both values are clamped,
never rejected: limit is capped at 200 (default 50), an invalid page falls back to 1.
The meta object of the response tells whether more results are available (hasMore)
and how many items exist in total (total).