Canonicalizes the spellings different MJ command families grew independently.
mj test * shipped console|json|markdown, mj ai * shipped compact|json|table,
and the plugin commands shipped text|json|md. All three keep working; they just
mean the same three things now. Returns undefined for an unrecognized value so
the caller can fall through rather than silently picking a format.
Canonicalizes the spellings different MJ command families grew independently.
mj test *shippedconsole|json|markdown,mj ai *shippedcompact|json|table, and the plugin commands shippedtext|json|md. All three keep working; they just mean the same three things now. Returnsundefinedfor an unrecognized value so the caller can fall through rather than silently picking a format.