Support Sentraq S65-X

Add initial support for ANSI layout of S65-X.
Includes support for controlling RGB underlighting.

keyboards/s65_x/s65_x.c

@@ -0,0 +1,30 @@
+#include "s65_x.h"
+#include "led.h"
+
+void matrix_init_kb(void) {
+  // put your keyboard start-up code here
+  // runs once when the firmware starts up
+  matrix_init_user();
+  led_init_ports();
+};
+
+void matrix_scan_kb(void) {
+  // put your looping keyboard code here
+  // runs every cycle (a lot)
+  matrix_scan_user();
+};
+
+void led_init_ports(void) {
+  // * Set our LED pins as output
+  DDRB |= (1<<7);
+}
+
+void led_set_kb(uint8_t usb_led) {
+  if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
+    // Turn capslock on
+    PORTB &= ~(1<<7);
+  } else {
+    // Turn capslock off
+    PORTB |= (1<<7);
+  }
+}