Remove WorkdayDA/ExtendedTopics folder (#505)

Extended Topics are not currently supported for DA preview — the folder
was added to WorkdayDA as a residual from Workday and is being removed.

Removes GetInboxTasks, GetPaySlips, RequestFeedback, TransferEmployee
and their assets. No references to this folder remain elsewhere in
the repo.

Co-authored-by: Adwait Raut <adwaitraut@microsoft.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 3 people