feat(cdk/global-listener): initial global listener implementation

[wagnermaciel]

No description provided.

[crisbeto]

Is there any context behind why this new package is being introduced? It doesn't look like it's used anywhere.

[wagnermaciel]

Yeah, we're having some scalability issues with applications that have hundreds of the same component on the same page. One of the issues is the number of independent event listeners being attached. I still need to do some experimenting internally to see if this actually alleviates the issue

[crisbeto]

Do we have any concrete examples where this would help though? We generally don't want to implement our own event management on top of the framework.

I suspect that we got rid of a lot of the listeners in #26147.

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