internal/pipewire: treat unknown opcode as fatal

Skipping events can cause local state to diverge from the server.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pipewire/client.go

@@ -113,7 +113,7 @@ func (client *Client) consume(opcode byte, files []int, unmarshal func(v any)) e
 		return nil
 
 	default:
-		return &UnsupportedOpcodeError{opcode, client.String()}
+		panic(&UnsupportedOpcodeError{opcode, client.String()})
 	}
 }