#3543 docs: Documented pending deprecations Pull request opened by edgarrmondragon SSIA Summary by Sourcery Document pending deprecations and align deprecation warnings with a new pending deprecation warning type. New Features: • Introduce a SingerSDKPendingDeprecationWarning class for features without a committed removal timeline. Enhancements: • Update existing deprecated APIs to use the new pending deprecation warning type instead of immediate deprecation warnings. • Include BasePageNumberPaginator and BaseOffsetPaginator removal plans in the deprecation documentation. • Configure test warning filters to handle the new pending deprecation warning category. Tests: • Adjust pagination deprecation tests to expect the new pending deprecation warning type. meltano/sdk