Add Conversation command to timers (#118325)

* Add Assist command to timers

* Rename to conversation_command. Execute in timer code.

* Make agent_id optional

* Fix arg

---------

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

homeassistant/helpers/intent.py

@@ -104,6 +104,7 @@ async def async_handle(
     language: str | None = None,
     assistant: str | None = None,
     device_id: str | None = None,
+    conversation_agent_id: str | None = None,
 ) -> IntentResponse:
     """Handle an intent."""
     handler = hass.data.get(DATA_KEY, {}).get(intent_type)
@@ -127,6 +128,7 @@ async def async_handle(
         language=language,
         assistant=assistant,
         device_id=device_id,
+        conversation_agent_id=conversation_agent_id,
     )
 
     try:
@@ -1156,6 +1158,7 @@ class Intent:
         "category",
         "assistant",
         "device_id",
+        "conversation_agent_id",
     ]
 
     def __init__(
@@ -1170,6 +1173,7 @@ class Intent:
         category: IntentCategory | None = None,
         assistant: str | None = None,
         device_id: str | None = None,
+        conversation_agent_id: str | None = None,
     ) -> None:
         """Initialize an intent."""
         self.hass = hass
@@ -1182,6 +1186,7 @@ class Intent:
         self.category = category
         self.assistant = assistant
         self.device_id = device_id
+        self.conversation_agent_id = conversation_agent_id
 
     @callback
     def create_response(self) -> IntentResponse: