添加 EchoEar 喵伴 (#869)

* add EchoEar

Co-authored-by: Qin Feng <qingfeng@espressif.com>

* feat: use new display backlight API

* feat: use MCP protocol

* remove yuying lcd

* add echoear README.md

---------

Co-authored-by: NingYuxiang <ningyuxiang@espressif.com>
Co-authored-by: Qin Feng <qingfeng@espressif.com>

main/boards/echoear/touch.h

@@ -0,0 +1,51 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file
+ * @brief BSP Touchscreen
+ *
+ * This file offers API for basic touchscreen initialization.
+ * It is useful for users who want to use the touchscreen without the default Graphical Library LVGL.
+ *
+ * For standard LCD initialization with LVGL graphical library, you can call all-in-one function bsp_display_start().
+ */
+
+#pragma once
+#include "esp_lcd_touch.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief BSP touch configuration structure
+ *
+ */
+typedef struct {
+    void *dummy;    /*!< Prepared for future use. */
+} bsp_touch_config_t;
+
+/**
+ * @brief Create new touchscreen
+ *
+ * If you want to free resources allocated by this function, you can use esp_lcd_touch API, ie.:
+ *
+ * \code{.c}
+ * esp_lcd_touch_del(tp);
+ * \endcode
+ *
+ * @param[in]  config    touch configuration
+ * @param[out] ret_touch esp_lcd_touch touchscreen handle
+ * @return
+ *      - ESP_OK         On success
+ *      - Else           esp_lcd_touch failure
+ */
+esp_err_t bsp_touch_new(const bsp_touch_config_t *config, esp_lcd_touch_handle_t *ret_touch);
+
+#ifdef __cplusplus
+}
+#endif