Use struct, idomatic go way to write homeassistant component and make it 100 test covered

src/components/homeassistant/homeassistant.go

@@ -122,7 +122,7 @@ func (ha *HomeAssistant) handleGetLatestPoo() bool {
 }
 
 func (ha *HomeAssistant) createActionTask(message haMessage) bool {
-	if !viper.InConfig("homeassistant.actionTaskProjectId") {
+	if !viper.IsSet("homeassistant.actionTaskProjectId") {
 		slog.Warn("homeassistant.createActionTask: actionTaskProjectId not found in config file")
 		return false
 	}