Import upstream Diehard4 by obscurant

Verbatim contents of the upstream GitHub archive (Diehard4-master.zip,
commit 254ee204deebc64793123a9643c85b7d113c6c22, files dated 2019-05-21).

Imported unmodified so that every change in this fork is visible as a diff
against the original, which is what GPL-3.0 section 5(a) is asking for.
All code in this commit is obscurant's work, not mine.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

xfwm4/stick-prelight.xpm

@@ -0,0 +1,26 @@
+/* XPM */
+static char * stick_prelight_xpm[] = {
+"13 13 10 1",
+" 	c #0D151D",
+".	c #492816",
+"+	c #95410E",
+"@	c #9F440D",
+"#	c #16181C",
+"$	c #9D430D",
+"%	c #271D1A",
+"&	c #ABADB0",
+"*	c #412617",
+"=	c #8A3D0F",
+"             ",
+" .+@@@@@@@+. ",
+"#$@@@@@@@@@$#",
+"%@@@@@@@@@@@%",
+"%@@@@&&&@@@@%",
+"%@@@&&@&&@@@%",
+"%@@@&@@@&@@@%",
+"%@@@&&@&&@@@%",
+"%@@@@&&&@@@@%",
+"%@@@@@@@@@@@%",
+"#$@@@@@@@@@$#",
+" *=@@@@@@@=* ",
+"             "};