Aubit 4GL SVN-Code

If pkg-config ncursesw is not found, link-probe plain -lncurses/-lpanel/-lform
with a wide-character program; if it links, build libUI_TUI_wide against those
libraries. The wide plug-in link line now uses @WIDE_CURSES_LIBS@ instead of a
hardcoded -lncursesw -lpanelw -lformw. Regenerated configure.

Add etc/containers/alpine-nowide.Containerfile (ncurses laid out like macOS) and
have checks.sh report whether libUI_TUI_wide.so was built.

Co-Authored-By: Claude Sonnet 5.5 <noreply@...>