Update All to yield indexed values; remove All2

Improve Connect API and use of context

Introduce context.Context support

Update Values to propagate errors and extend tests

Guard buffer begin advance to preserve replay

Add command pattern example and doc for Defer function

Fix channel close behavior in Multicast when done without error

Add Example_mergeMapSubject test to demonstrate subject behavior

Add example test for mergeMap function

Move emission struct inside Delay function

Update operator documentation with links and detailed descriptions

Update documentation with improved Observable explanations

Add AutoConnect example and fix Publish unsubscription

Refactor Multicast to handle subscriber termination correctly

Add documentation to Observer type and methods