Extract UsbCommand_SetLedPwmBrightness() into its own file.

right/src/usb_commands/usb_command_set_led_pwm_brightness.c

@@ -0,0 +1,10 @@
+#include "usb_protocol_handler.h"
+#include "slave_drivers/uhk_module_driver.h"
+#include "led_pwm.h"
+
+void UsbCommand_SetLedPwmBrightness(void)
+{
+    uint8_t brightnessPercent = GenericHidInBuffer[1];
+    LedPwm_SetBrightness(brightnessPercent);
+    UhkModuleStates[UhkModuleDriverId_LeftKeyboardHalf].sourceVars.ledPwmBrightness = brightnessPercent;
+}

right/src/usb_commands/usb_command_set_led_pwm_brightness.h

@@ -0,0 +1,8 @@
+#ifndef __USB_COMMAND_SET_LED_PWM_BRIGHTNESS_H__
+#define __USB_COMMAND_SET_LED_PWM_BRIGHTNESS_H__
+
+// Functions:
+
+    void UsbCommand_SetLedPwmBrightness(void);
+
+#endif