Add reload updates for main components

Add /reload_updates endpoint which refreshes updates of the main components
only (OS, Supervisor, Core and Plug-ins).

Author: agners

aiohasupervisor/root.py

@@ -109,12 +109,19 @@ async def info(self) -> RootInfo:
         result = await self._client.get("info")
         return RootInfo.from_dict(result.data)
 
+    async def reload_updates(self) -> None:
+        """Reload updates.
+
+        Reload main components update information (OS, Supervisor, Core and plug-ins).
+        """
+        await self._client.post("reload_updates", timeout=ClientTimeout(total=300))
+
     async def refresh_updates(self) -> None:
-        """Refresh updates."""
+        """Refresh updates (discouraged)."""
         await self._client.post("refresh_updates", timeout=ClientTimeout(total=300))
 
     async def available_updates(self) -> list[AvailableUpdate]:
-        """Get available updates."""
+        """Get available updates (discouraged)."""
         result = await self._client.get("available_updates")
         return AvailableUpdates.from_dict(result.data).available_updates