Fix hyphenated predicate names breaking tabled/1

[Aryam-21]

Reproducing the bug (before this fix)

Run this against the unpatched lib_tabling.metta:

!(import! &self (library lib_tabling))
(= (count-atom $x $y) True)
!(tabled (count-atom $x $y))

This fails with:

ERROR: Domain error: `tabled_mode` expected, found `count`

Root cause: tabled/1 embeds the predicate name unquoted in the
generated :- table Name/Arity. directive. Since - is a Prolog
infix operator, count-atom gets parsed as count - atom instead
of as an atom.

Fix

Wrap the name in single quotes before embedding it, so it's read
as one atom regardless of its characters:

:- table 'count-atom'/3.

Verified

?- atomics_to_string([":- table '", "count-atom", "'/", "3", "."], Code),
   open_string(Code, S), load_files(user, [stream(S)]).
Code = ":- table 'count-atom'/3."   % succeeds, no error

Also confirmed end-to-end via sh run.sh examples/tabling_hyphen.metta
— tabled((count-atom $x $y)) now loads with no error.