dir, vdir: match GNU default quoting

[ChihweiLHBird]

Apply escape quoting and TTY control-character display in Config instead of patching quoting_style in the dir and vdir wrappers.

Some basic examples:

File	Command	uutils before	after / GNU
a b	QUOTING_STYLE=literal dir	a\ b	a b
a b	dir --zero	a\ b\0	a b\0
a\nb	dir -N on a TTY	a?b	real newline

[github-actions]

GNU testsuite comparison:

Note: The gnu test tests/tail/tail-n0f is now being skipped but was previously passing.
Congrats! The gnu test tests/seq/seq-epipe is now passing!