fix: forward thread_id to Telegram adapter + update send_typing signatures

Part 2 of thread_id forum topic fix: add metadata param to
send_voice, send_image, send_animation, send_typing in Telegram
adapter and pass message_thread_id to all Bot API calls. Update
send_typing signature in Discord, Slack, WhatsApp, HomeAssistant
for compatibility.

Based on the fix proposed by @Bitstreamono in PR #656.

gateway/platforms/homeassistant.py

@@ -419,7 +419,7 @@ class HomeAssistantAdapter(BasePlatformAdapter):
         except Exception as e:
             return SendResult(success=False, error=str(e))
 
-    async def send_typing(self, chat_id: str) -> None:
+    async def send_typing(self, chat_id: str, metadata=None) -> None:
         """No typing indicator for Home Assistant."""
         pass