Restructure the codebase across more files.

right/usb_class_keyboard.c

@@ -0,0 +1,39 @@
+#include "usb_device_config.h"
+#include "usb.h"
+#include "usb_device.h"
+#include "include/usb/usb_device_class.h"
+#include "include/usb/usb_device_hid.h"
+#include "usb_descriptor_device.h"
+#include "usb_class_keyboard.h"
+
+static usb_device_endpoint_struct_t UsbKeyboardEndpoints[USB_KEYBOARD_ENDPOINT_COUNT] = {{
+    USB_KEYBOARD_ENDPOINT_ID | (USB_IN << USB_DESCRIPTOR_ENDPOINT_ADDRESS_DIRECTION_SHIFT),
+    USB_ENDPOINT_INTERRUPT,
+    USB_KEYBOARD_INTERRUPT_IN_PACKET_SIZE,
+}};
+
+static usb_device_interface_struct_t UsbKeyboardInterface[] = {{
+    USB_KEYBOARD_INTERFACE_ALTERNATE_SETTING,
+    {USB_KEYBOARD_ENDPOINT_COUNT, UsbKeyboardEndpoints},
+    NULL,
+}};
+
+static usb_device_interfaces_struct_t UsbKeyboardInterfaces[USB_KEYBOARD_INTERFACE_COUNT] = {{
+    USB_KEYBOARD_CLASS,
+    USB_KEYBOARD_SUBCLASS,
+    USB_KEYBOARD_PROTOCOL,
+    USB_KEYBOARD_INTERFACE_INDEX,
+    UsbKeyboardInterface,
+    sizeof(UsbKeyboardInterface) / sizeof(usb_device_interfaces_struct_t),
+}};
+
+static usb_device_interface_list_t UsbKeyboardInterfaceList[USB_DEVICE_CONFIGURATION_COUNT] = {{
+    USB_KEYBOARD_INTERFACE_COUNT,
+    UsbKeyboardInterfaces,
+}};
+
+usb_device_class_struct_t UsbKeyboardClass = {
+    UsbKeyboardInterfaceList,
+    kUSB_DeviceClassTypeHid,
+    USB_DEVICE_CONFIGURATION_COUNT,
+};