feat：统一加载插件，区分内部插件和外部插件，提供示例命令发送插件

src/plugins/example_command_plugin/commands/custom_prefix_command.py

@@ -0,0 +1,58 @@
+from src.common.logger_manager import get_logger
+from src.chat.message_receive.command_handler import BaseCommand, register_command
+from typing import Tuple, Optional
+import random
+
+logger = get_logger("custom_prefix_command")
+
+@register_command
+class DiceCommand(BaseCommand):
+    """骰子命令，使用!前缀而不是/前缀"""
+    
+    command_name = "dice"
+    command_description = "骰子命令，随机生成1-6的数字"
+    command_pattern = r"^[!！](?:dice|骰子)(?:\s+(?P<count>\d+))?$"  # 匹配 !dice 或 !骰子，可选参数为骰子数量
+    command_help = "使用方法: !dice [数量] 或 !骰子 [数量] - 掷骰子，默认掷1个"
+    command_examples = ["!dice", "!骰子", "!dice 3", "！骰子 5"]
+    enable_command = True
+    
+    async def execute(self) -> Tuple[bool, Optional[str]]:
+        """执行骰子命令
+        
+        Returns:
+            Tuple[bool, Optional[str]]: (是否执行成功, 回复消息)
+        """
+        try:
+            # 获取骰子数量，默认为1
+            count_str = self.matched_groups.get("count")
+            
+            # 确保count_str不为None
+            if count_str is None:
+                count = 1  # 默认值
+            else:
+                try:
+                    count = int(count_str)
+                    if count <= 0:
+                        return False, "骰子数量必须大于0"
+                    if count > 10:  # 限制最大数量
+                        return False, "一次最多只能掷10个骰子"
+                except ValueError:
+                    return False, "骰子数量必须是整数"
+            
+            # 生成随机数
+            results = [random.randint(1, 6) for _ in range(count)]
+            
+            # 构建回复消息
+            if count == 1:
+                message = f"🎲 掷出了 {results[0]} 点"
+            else:
+                dice_results = ", ".join(map(str, results))
+                total = sum(results)
+                message = f"🎲 掷出了 {count} 个骰子: [{dice_results}]，总点数: {total}"
+            
+            logger.info(f"{self.log_prefix} 执行骰子命令: {message}")
+            return True, message
+        
+        except Exception as e:
+            logger.error(f"{self.log_prefix} 执行骰子命令时出错: {e}")
+            return False, f"执行命令时出错: {str(e)}"