feat: applied swapwindows patch

config.def.h

@@ -86,6 +86,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_period, focusmon,       {.i = +1 } },
 	{ MODKEY|ShiftMask,             XK_comma,  tagmon,         {.i = -1 } },
 	{ MODKEY|ShiftMask,             XK_period, tagmon,         {.i = +1 } },
+        { MODKEY|ShiftMask,             XK_slash,  swapwindow,     {0} },
 	TAGKEYS(                        XK_1,                      0)
 	TAGKEYS(                        XK_2,                      1)
 	TAGKEYS(                        XK_3,                      2)

dwm.c

@@ -232,6 +232,7 @@ static int xerror(Display *dpy, XErrorEvent *ee);
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void swapwindow(const Arg *arg);
 
 /* variables */
 static const char broken[] = "broken";
@@ -2140,6 +2141,51 @@ zoom(const Arg *arg)
 	pop(c);
 }
 
+void
+swapwindow(const Arg *arg)
+{
+    if (!selmon || !selmon->sel || !mons->next)
+        return;
+
+    Monitor *m1 = selmon;
+    Monitor *m2 = dirtomon(+1);
+
+    Client *c1 = m1->sel;
+    Client *c2 = m2->sel;
+
+    if (!c2) {
+        detach(c1);
+        detachstack(c1);
+        c1->mon = m2;
+        attach(c1);
+        attachstack(c1);
+        focus(c1);
+        selmon = m2;
+        arrange(m1);
+        arrange(m2);
+        return;
+    }
+
+    detach(c1);
+    detachstack(c1);
+    detach(c2);
+    detachstack(c2);
+
+    c1->mon = m2;
+    attach(c1);
+    attachstack(c1);
+    focus(c1);
+
+    c2->mon = m1;
+    attach(c2);
+    attachstack(c2);
+    focus(c2);
+
+    selmon = m1;
+    arrange(m1);
+    arrange(m2);
+}
+
 int
 main(int argc, char *argv[])
 {