~/.config/dwm: Add shortcut to spawn editor

.config/dwm/config.h

static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
static const char *termcmd[]  = { "/usr/bin/sakura", NULL };
static const char *editorcmd[] = { "emacs", NULL };
static const char *volumedowncmd[] = { "amixer", "set", "Master", "5%-", NULL };
static const char *volumeupcmd[] = { "amixer", "set", "Master", "5%+", NULL };
static const char *volumetogglecmd[] = { "amixer", "set", "Master", "toggle", NULL };
	TAGKEYS(                        XK_9,                      8)
	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
	{ MODKEY,                       XK_e,      spawn,          { .v = editorcmd } },
	{ 0,                            XF86XK_AudioLowerVolume, spawn, { .v = volumedowncmd } },
	{ 0,                            XF86XK_AudioRaiseVolume, spawn, { .v = volumeupcmd } },
	{ 0,                            XF86XK_AudioMute       , spawn, { .v = volumetogglecmd } },