Code cleanup: Add constants to header for dark mode, buffer sizes and Unicode support. Windows and OS/2 can both be built without Unicode support for legacy platforms and apps. Some new Windows features require Unicode (notifications, edge) and Unicode is buggy on OS/2. Can now check if Unicode is supported with the DW_FEATURE_UTF8_UNICODE feature test. Dark mode constants added DW_DARK_MODE_DISABLED/BASIC/FULL/FORCED. Win: Include dw.h in the WinToast glue for the constants, and improve safety in Edge glue.

prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${exec_prefix}/include
 
Name: dwindows
Description: Dynamic Windows Cross platform UI Toolkit
Version: @VERSION@
Libs: -L${prefix}/lib -ldwindows @LIBS@
Cflags: -I${prefix}/include @CFLAGS@ -D@DW_DEFINE@