Convert eeconfig_init_kb implementations to config (#24087)

keyboards/nix_studio/oxalys80/config.h

@@ -13,14 +13,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#pragma once
 
-#include "quantum.h"
-
-void eeconfig_init_kb(void) {  // EEPROM is getting reset!
-  rgblight_enable(); // Enable RGB by default
-  rgblight_sethsv(0, 255, 128);  // Set default HSV - red hue, full saturation, medium brightness
-  rgblight_mode(RGBLIGHT_MODE_RAINBOW_SWIRL + 2); // set to RGB_RAINBOW_SWIRL by default
-  
-  eeconfig_update_kb(0);
-  eeconfig_init_user();
-}
+#define RGBLIGHT_DEFAULT_MODE (RGBLIGHT_MODE_RAINBOW_SWIRL + 2)

keyboards/nix_studio/oxalys80/keyboard.json

@@ -39,6 +39,9 @@
         "pin": "B3"
     },
     "rgblight": {
+        "default": {
+            "val": 128
+        },
         "saturation_steps": 8,
         "brightness_steps": 8,
         "led_count": 24,