As part of #32957, let's deprecate sage.misc.viewer in favor of (a) for images, a version that uses Sage's Features and (b) for web browsing, the Python library webbrowser.

CC: @seblabbe

Component: misc

Author: John Palmieri

Branch/Commit: u/jhpalmieri/deprecate-viewer @ cb099ed

Reviewer: Sébastien Labbé

Issue created by migration from https://trac.sagemath.org/ticket/33931