docs: 新增 telegram 适配器 example (#174)

Author: st1020

packages/alicebot-adapter-telegram/examples/who.py

@@ -0,0 +1,22 @@
+"""Who are you 插件。"""
+
+from typing_extensions import override
+
+from alicebot import Plugin
+from alicebot.adapter.telegram.event import MessageEvent
+
+
+class Who(Plugin[MessageEvent, None, None]):
+    """Who are you 插件。"""
+
+    @override
+    async def handle(self) -> None:
+        answer = await self.event.ask("Who are you?")
+        await self.event.reply(f"Hello, {answer.get_plain_text()}")
+
+    @override
+    async def rule(self) -> bool:
+        return (
+            isinstance(self.event, MessageEvent)
+            and self.event.get_plain_text() == "/who"
+        )