docs: update for AstrBotDevs/AstrBot#5331

Author: astrbot-docs-agent[bot]

en/dev/star/guides/listen-message-event.md

@@ -252,6 +252,32 @@ async def on_astrbot_loaded(self):
 
 ```
 
+#### On Plugin Loaded
+
+Triggered when a plugin has finished loading. You can access the plugin's metadata.
+
+```python
+from astrbot.api.event import filter
+from astrbot.api.star import StarMetadata
+
+@filter.on_plugin_loaded()
+async def on_plugin_loaded(self, metadata: StarMetadata):
+    print(f"Plugin {metadata.name} has been loaded")
+```
+
+#### On Plugin Unloaded
+
+Triggered when a plugin has finished unloading. You can access the plugin's metadata.
+
+```python
+from astrbot.api.event import filter
+from astrbot.api.star import StarMetadata
+
+@filter.on_plugin_unloaded()
+async def on_plugin_unloaded(self, metadata: StarMetadata):
+    print(f"Plugin {metadata.name} has been unloaded")
+```
+
 #### On LLM Request
 
 In AstrBot's default execution flow, the `on_llm_request` hook is triggered before calling the LLM.

zh/dev/star/guides/listen-message-event.md

@@ -252,6 +252,32 @@ async def on_astrbot_loaded(self):
 
 ```
 
+#### 插件加载完成时
+
+当有插件加载完成时触发，可以获取到该插件的元数据。
+
+```python
+from astrbot.api.event import filter
+from astrbot.api.star import StarMetadata
+
+@filter.on_plugin_loaded()
+async def on_plugin_loaded(self, metadata: StarMetadata):
+    print(f"插件 {metadata.name} 已加载")
+```
+
+#### 插件卸载完成时
+
+当有插件卸载完成时触发，可以获取到该插件的元数据。
+
+```python
+from astrbot.api.event import filter
+from astrbot.api.star import StarMetadata
+
+@filter.on_plugin_unloaded()
+async def on_plugin_unloaded(self, metadata: StarMetadata):
+    print(f"插件 {metadata.name} 已卸载")
+```
+
 #### 等待 LLM 请求时
 
 在 AstrBot 准备调用 LLM 但还未获取会话锁时，会触发 `on_waiting_llm_request` 钩子。