List of Perl modules which have XS implementation or backend

Changes for 0.004 - 2023-09-05

• Fix/switch PP module and main module JSON <-> JSON:😛P.
• Add entries from Missing:🤐S: JSON::MaybeXS, Moo, Object::Adhoc, Object::Accessor, PPI, Type:😛arams (from Missing:🤐S).
• [doc] Tweak summary/Abstract.
• [doc] Mention Missing:🤐S.