feat：添加内置emoji管理插件

plugins/emoji_manage_plugin/_manifest.json

@@ -0,0 +1,53 @@
+{
+  "manifest_version": 1,
+  "name": "BetterEmoji",
+  "version": "1.0.0",
+  "description": "更好的表情包管理插件",
+  "author": {
+    "name": "SengokuCola",
+    "url": "https://github.com/SengokuCola"
+  },
+  "license": "GPL-v3.0-or-later",
+  
+  "host_application": {
+    "min_version": "0.10.4"
+  },
+  "homepage_url": "https://github.com/SengokuCola/BetterEmoji",
+  "repository_url": "https://github.com/SengokuCola/BetterEmoji",
+  "keywords": ["emoji", "manage", "plugin"],
+  "categories": ["Examples", "Tutorial"],
+  
+  "default_locale": "zh-CN",
+  "locales_path": "_locales",
+  
+  "plugin_info": {
+    "is_built_in": false,
+    "plugin_type": "emoji_manage",
+    "components": [
+      {
+        "type": "action",
+        "name": "hello_greeting",
+        "description": "向用户发送问候消息"
+      },
+      {
+        "type": "action",
+        "name": "bye_greeting", 
+        "description": "向用户发送告别消息",
+        "activation_modes": ["keyword"],
+        "keywords": ["再见", "bye", "88", "拜拜"]
+      },
+      {
+        "type": "command",
+        "name": "time",
+        "description": "查询当前时间",
+        "pattern": "/time"
+      }
+    ],
+    "features": [
+      "问候和告别功能",
+      "时间查询命令",
+      "配置文件示例",
+      "新手教程代码"
+    ]
+  }
+}