Add support for beforescriptexecute / afterscriptexecute

[23443]

Hello,

uBlock origin has something called Inline script tag filtering. It can block specific inline script tag while keeping other desirable inline JavaScript code intact.

This uBlock feature doesn't work in Chromium-based browser, because google decided not to implement beforescriptexecute/afterscriptexecute on chromium.

This is probably difficult to implement, but it would be great if Vivaldi can support beforescriptexecute / afterscriptexecute event.

Or maybe in the future, vivaldi can add its own native feature similar to ublock's inline script tag filtering.

Thanks