Add `RGBLIGHT_DEFAULT_ON` macro configuration option (#20857)

* ADD RGB_DEFAULT_DISABLED option and updated documentation

* Formatting

* Add  as by fauxpark's suggestion

Co-authored by: fauxpark

* Formatting

* Use boolean values instead of numerical

Co-authored-by: Ryan <fauxpark@gmail.com>

* Edit documentation formatting

Co-authored-by: Ryan <fauxpark@gmail.com>

* Remove comment

Co-authored-by: Ryan <fauxpark@gmail.com>

* Set RGB mode to DEFAULT macro at init

Co-authored-by: Ryan <fauxpark@gmail.com>

---------

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: zvecr <git@zvecr.com>

docs/feature_rgblight.md

@@ -102,6 +102,7 @@ Your RGB lighting can be configured by placing these `#define`s in your `config.
 |`RGBLIGHT_DEFAULT_SAT`     |`UINT8_MAX` (255)           |The default saturation to use upon clearing the EEPROM                                                                     |
 |`RGBLIGHT_DEFAULT_VAL`     |`RGBLIGHT_LIMIT_VAL`        |The default value (brightness) to use upon clearing the EEPROM                                                             |
 |`RGBLIGHT_DEFAULT_SPD`     |`0`                         |The default speed to use upon clearing the EEPROM                                                                          |
+|`RGBLIGHT_DEFAULT_ON`      |`true`                      |Enable RGB lighting upon clearing the EEPROM                                                                               |
 
 ## Effects and Animations
 

quantum/rgblight/rgblight.c

@@ -86,6 +86,10 @@ static uint8_t mode_base_table[] = {
 #    define RGBLIGHT_DEFAULT_SPD 0
 #endif
 
+#if !defined(RGBLIGHT_DEFAULT_ON)
+#    define RGBLIGHT_DEFAULT_ON true
+#endif
+
 static inline int is_static_effect(uint8_t mode) {
     return memchr(static_effect_table, mode, sizeof(static_effect_table)) != NULL;
 }
@@ -195,7 +199,7 @@ void eeconfig_update_rgblight_current(void) {
 }
 
 void eeconfig_update_rgblight_default(void) {
-    rgblight_config.enable    = 1;
+    rgblight_config.enable    = RGBLIGHT_DEFAULT_ON;
     rgblight_config.velocikey = 0;
     rgblight_config.mode      = RGBLIGHT_DEFAULT_MODE;
     rgblight_config.hue       = RGBLIGHT_DEFAULT_HUE;