Enable support for bufferRequests similar to appMeasurement

### Expected Behaviour
Ability to buffer the websdk call on page unload so that the values can be sent on next page load event

### Actual Behaviour
Currently when the page is getting unload and a Interact call is triggered, there is a very high chance that the call would get cancelled and the data would be lost, this is more promenent with clicks which leads to page navigation, and this make tracking such clicks difficult

Here is the current document how it works in AppMeasurement

https://experienceleague.adobe.com/en/docs/analytics/implementation/vars/functions/bufferrequests

### Reproduce Scenario (including but not limited to)
This is replicable in almost any website

#### Steps to Reproduce

#### Platform and Version

#### Sample Code that illustrates the problem

#### Logs taken while reproducing problem

No source file, test, or entry point is identified in the issue. Start by reviewing the web SDK's handling of calls during page unload and the linked AppMeasurement bufferRequests documentation; done means calls triggered before navigation are retained and sent on the next page load.

Written by the indexing model from the issue text.