feat: add dispatch groupleave

src/config/parse_config.h

@@ -1020,6 +1020,8 @@ FuncType parse_func_name(char *func_name, Arg *arg, char *arg_value,
 	} else if (strcmp(func_name, "groupjoin") == 0) {
 		func = groupjoin;
 		(*arg).i = parse_direction(arg_value);
+	} else if (strcmp(func_name, "groupleave") == 0) {
+		func = groupleave;
 	} else if (strcmp(func_name, "focusid") == 0) {
 		func = focusid;
 	} else if (strcmp(func_name, "incnmaster") == 0) {

src/dispatch/bind_declare.h

@@ -3,6 +3,7 @@ int32_t restore_minimized(const Arg *arg);
 int32_t toggle_scratchpad(const Arg *arg);
 int32_t focusdir(const Arg *arg);
 int32_t groupjoin(const Arg *arg);
+int32_t groupleave(const Arg *arg);
 int32_t toggleoverview(const Arg *arg);
 int32_t togglejump(const Arg *arg);
 int32_t set_proportion(const Arg *arg);

src/dispatch/bind_define.h

@@ -198,6 +198,40 @@ int32_t groupjoin(const Arg *arg) {
 	return 0;
 }
 
+int32_t groupleave(const Arg *arg) {
+
+	if (!selmon)
+		return 0;
+	Client *tc = arg->tc ? arg->tc : selmon->sel;
+	if (!tc || !tc->isgroupfocusing)
+		return 0;
+	if (!tc->group_next && !tc->group_prev) {
+		return 0;
+	}
+	Client *rc = tc->group_next ? tc->group_next : tc->group_prev;
+
+	client_focus_group_member(rc);
+
+	if (tc->group_prev) {
+		tc->group_prev->group_next = tc->group_next;
+	}
+
+	if (tc->group_next) {
+		tc->group_next->group_prev = tc->group_prev;
+	}
+
+	tc->group_prev = NULL;
+	tc->group_next = NULL;
+	tc->isgroupfocusing = false;
+
+	wl_list_insert(&rc->link, &tc->link);
+	wl_list_insert(&rc->flink, &tc->flink);
+
+	arrange(tc->mon, false, false);
+
+	return 0;
+}
+
 int32_t focuslast(const Arg *arg) {
 	Client *c = NULL;
 	Client *tc = NULL;