feat: listen method in BuildContext extension as functioning BlocListener

[Jaewoo]

Description

I usually use context.watch, context.select, context.read instead of BlocBuilder, BlocSelector. Because, it makes widget tree more clear to use extension method in BuildContext than class widgets.

But there is no context.listen. So I should use BlocListener.
I want to use context.listen method instead of BlocListener.

Desired Solution

context.listen<AppBloc, AppState>((context, state) {}, listenWhen: (prev, curr) => true);

The first positional parameter is a function which has two parameters, BuildContext and the state of Bloc respectively.
listenWhen is the named parameter and it functions like listenWhen in BlocListener class.

[Fernan Buan]

That's context.select in a long form.
Can you give more explanation about your use-case?