添加热重载，优化readme

base_plugins/__init__.py

@@ -1,6 +1,7 @@
 import importlib
 import os
 import pkgutil
+import sys
 
 
 def load_all_plugins():
@@ -14,11 +15,17 @@ def load_all_plugins():
         full_module_name = f"{package_name}.{module_name}"
 
         try:
-            importlib.import_module(full_module_name)
+            if full_module_name in sys.modules:
+                importlib.reload(sys.modules[full_module_name])
+                action = "重载"
+            else:
+                importlib.import_module(full_module_name)
+                action = "加载"
+            
             type_str = "包" if is_pkg else "文件"
-            print(f"   [{type_str}] 成功加载: {module_name}")
+            print(f"   [{type_str}] 成功{action}: {module_name}")
         except Exception as e:
-            print(f"   加载插件 {module_name} 失败: {e}")
+            print(f"   {action if 'action' in locals() else '加载'}插件 {module_name} 失败: {e}")
 
 
 load_all_plugins()