feat(v4): the ROM reads numbers as text.c does

(NUMBER) ( -- n flag ), entry 2: decimal with a leading -, or hex after $;
1 a number, 0 not one, -1 one that does not fit a cell.  Every case is also
given to text.c, the oracle, at both widths.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

capsules/v4/rom/main.f18

@@ -9,3 +9,4 @@
 : (ENTRIES)
   jump (KEY)                    \ 0   ( -- c )
   jump (TOKEN)                  \ 1   ( -- len )
+  jump (NUMBER)                 \ 2   ( -- n flag )