[GR-53491] Consider adding support for Callback on closing event of polyglot Context object

[FieryCod]

Feature request

When using PolyglotAPI one might want to patch setInterval/setTimeout via Java Executor Pool. In such cases when closing the Context I would like to handle clear interval and timeout signals and consume all remaining events.

This might be possible only by additional listener attached to Context and triggered upon "close".

I think this is very important for users who wrap already existing JS/Python libraries.