Add a page input to the paginator

[AndreaBarbasso]

Is your feature request related to a problem? Please describe.

Users might need to click multiple times on the paginator (or, if they're a little bit tech-savvy, change the queryparam in the current page URL) if they want to go to any given page of a paginated section.

Describe the solution you'd like

The paginator might include an input to go to any given page, e.g.

Additional information

I already made the changes needed to implement this improvement (and opening a draft PR soon), though I am still thinking about the related configuration settings. For example, shall we have a setting that enables the input field if there are at least paginationInputMinNumberOfPages pages? Or shall we have a simple true/false value to enable or disable it by default, and then it can be changed via the component @Input?

[tdonohue]

@AndreaBarbasso : It may just be me, but I don't understand that interface design in the screenshot. Is that supposed to be a search box that is embedded into the paginator? I've never seen that sort of design before in other major sites, which makes me worried that it won't be well understood by end users.

I wonder if we should do a scan of other websites that perform a similar function and see how they do it. I'm not a fan of embedding a search box into the paginator as I feel it looks "messy".

[AndreaBarbasso]

@tdonohue, it's build on top of the demo/suggestion found in ngb's docs.
So yes, it's a search box embedded into the paginator placed where the current page is, and initially showing the current page number. Basically, the core functionality of the paginator is the same as before - it shows the current page, and lets you click on different pages to move to them - but now accepts input to change the current page.

Do you think it's better to have something exactly like what can be found on ngb's docs (that can be used as an alternative to the current paginator via a configuration setting)?