raco: skip problem "info.rkt" files

Allows some `raco` tools to work (such as `raco pkg`) when loading
information about other installed tools fails, so that problems can
be more easily corrected using working tools (other than `raco setup`,
which is a special case, anyway, for bootstrapping).

Closes PR 14221

Merge to v6.0
games: fix "About Games" menu item

Merge to v6.0
minor doc repair (sentence starting with non-capitalized name)

Merge to v6.0
scriblib/fgure: hyperlink figure references in PDF

Merge to v6.0