add config files for known boards

main/boards/esp-box-3/EspBox3Board.cc

@@ -0,0 +1,20 @@
+#include "WifiBoard.h"
+#include "BoxAudioDevice.h"
+
+#include <esp_log.h>
+
+#define TAG "EspBox3Board"
+
+class EspBox3Board : public WifiBoard {
+public:
+    virtual void Initialize() override {
+        ESP_LOGI(TAG, "Initializing EspBox3Board");
+        WifiBoard::Initialize();
+    }
+
+    virtual AudioDevice* CreateAudioDevice() override {
+        return new BoxAudioDevice();
+    }
+};
+
+DECLARE_BOARD(EspBox3Board);