refactor: merge wire codecs into core protocol libraries
Move Wire-based codecs from separate wire/ sublibraries into the core
libraries as Packed/Packed_header submodules. This eliminates the
clcw-wire, space-packet.wire, and tm-wire packages while keeping the
same functionality accessible via Clcw.Packed, Space_packet.Packed_header,
and Tm.Packed_header.