[Proposal?] Allow RGB Underglow to turn off when host is idle/asleep (#2104)

* Add RGB Underglow Sleeping

* Add RGBLIGHT_SLEEP to toggle/control RGB light behavior

* Update rgb docs

* Update for RGB disable command

keyboards/ergodox_ez/keymaps/drashna/config.h

@@ -10,6 +10,7 @@
 #define RGBLIGHT_EFFECT_KNIGHT_LENGTH 7
 #define RGBLIGHT_EFFECT_SNAKE_LENGTH 7
 #define RGBLIGHT_EFFECT_BREATHE_CENTER 1
+#define RGBLIGHT_SLEEP
 #endif // RGBLIGHT_ENABLE
 
 #ifdef TAPPING_TERM

keyboards/handwired/woodpad/keymaps/drashna/config.h

@@ -37,6 +37,7 @@
 #define RGBLIGHT_EFFECT_KNIGHT_LENGTH 4
 #define RGBLIGHT_EFFECT_SNAKE_LENGTH 3
 #define RGBLIGHT_EFFECT_BREATHE_CENTER 1
+#define RGBLIGHT_SLEEP
 #endif // RGBLIGHT_ENABLE
 
 #define FORCE_NKRO

keyboards/orthodox/keymaps/drashna/config.h

@@ -64,6 +64,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_EFFECT_KNIGHT_LENGTH 2
 #define RGBLIGHT_EFFECT_SNAKE_LENGTH 2
 #define RGBLIGHT_EFFECT_BREATHE_CENTER 1
+#define RGBLIGHT_SLEEP
 #endif // RGBLIGHT_ENABLE
 
 #ifdef AUDIO_ENABLE

keyboards/viterbi/keymaps/drashna/config.h

@@ -31,6 +31,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_EFFECT_KNIGHT_LENGTH 2
 #define RGBLIGHT_EFFECT_SNAKE_LENGTH 2
 #define RGBLIGHT_EFFECT_BREATHE_CENTER 1
+#define RGBLIGHT_SLEEP
 #define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 300
 #define RGBLIGHT_EFFECT_CHRISTMAS_STEP 1