`safeDelete` script

**Is your feature request related to a problem? If so, please describe.**
Unclear what was the problem that Jor'Mox was addressing with `safeDelete`, and if it was resolved. Sounds like the exits stubs of attached rooms are deleted, when deleting a room.

**Describe the solution you'd like**
Don't delete the exit stubs when a room is deleted.

**Describe alternatives you've considered**
Jor'mox provided an alternative as a menu addition called [safeDelete])https://forums.mudlet.org/viewtopic.php?p=44771&sid=baf30e91ed14bff7d61c48e75af6fa82#p44771)

Start by locating the safeDelete script and the room-deletion entry point in this Mudlet mapping script. Read the linked forum discussion for the intended behavior, then verify how deleting a room affects attached rooms' exit stubs; done means deletion preserves those stubs as requested.

Written by the indexing model from the issue text.