feat: add cherryecat

Signed-off-by: sakumisu <1203593632@qq.com>

Author: sakumisu

system/CherryECAT/Kconfig

@@ -0,0 +1,25 @@
+# Kconfig file for package CherryECAT
+menuconfig PKG_USING_CHERRYECAT
+    bool "CherryECAT: a tiny and beautiful, high real-time and low-jitter EtherCAT master stack, specially designed for MCUs running with RTOS"
+    default n
+
+if PKG_USING_CHERRYECAT
+
+    config PKG_CHERRYECAT_PATH
+        string
+        default "/packages/system/CherryECAT"
+
+    choice
+        prompt "Version"
+        default PKG_USING_CHERRYECAT_LATEST_VERSION
+        help
+            Select the package version
+
+        config PKG_USING_CHERRYECAT_LATEST_VERSION
+            bool "latest"
+    endchoice
+
+    config PKG_CHERRYECAT_VER
+       string
+       default "latest"    if PKG_USING_CHERRYECAT_LATEST_VERSION
+endif

system/CherryECAT/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "CherryECAT",
+  "description": "Tiny and beautiful, high real-time and low-jitter EtherCAT master stack, specially designed for MCUs running with RTOS",
+  "description_zh": "小而美的、高实时性、低抖动的 EtherCAT 主机协议栈，专为跑在 RTOS 下的 MCU 设计",
+  "enable": "PKG_USING_CHERRYECAT",
+  "keywords": [
+    "CherryECAT",
+    "EtherCAT"
+  ],
+  "category": "system",
+  "author": {
+    "name": "sakumisu",
+    "email": "1203593632@qq.com",
+    "github": "sakumisu"
+  },
+  "license": "Apache-2.0",
+  "repository": "https://github.com/cherry-embedded/CherryECAT",
+  "icon": "unknown",
+  "homepage": "https://github.com/cherry-embedded/CherryECAT#readme",
+  "doc": "unknown",
+  "site": [
+    {
+      "version": "latest",
+      "URL": "https://github.com/cherry-embedded/CherryECAT.git",
+      "filename": "Null for git package",
+      "VER_SHA": "master"
+    }
+  ]
+}