Start moving RGB MOD from Notification to RGB MOD service.

applications/services/rgb_backlight/rgb_backlight.c

@@ -0,0 +1,15 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <furi.h>
+#include "rgb_backlight.h"
+
+#define TAG "RGB_BACKLIGHT_SRV"
+
+int32_t rgb_backlight_srv (void* p){
+UNUSED (p);
+while (1){
+    FURI_LOG_I (TAG,"working");
+    furi_delay_ms (2000);
+}
+return 0;
+}