[💡 FEATURE REQUEST]: Support Mutable Side Effects

[roxblnfk]

Plugin

Temporal

I have an idea!

There is a feature named Mutable Side Effects in the GO SDK.

I need to provide a PHP code example about it but I can't because we have no this feature in PHP SDK.

I suppose some work needs to be done in the temporal plugin to greenlight the implementation of this feature in the PHP SDK.