Improve docs for `navbar` using `lov`

[Dr-Irv]

Description

In https://docs.taipy.io/en/develop/manuals/gui/viselements/navbar/, there is an example for using navbar with a list of values, but it is confusing (and possibly incorrect).

The example has this code for markdown:

<|navbar|lov={[("page1", "Page 1"), ("http://www.google.com", "Google")]}|>

The issue is that "page1" won't be found. So if you have pages that you have added to the application, via gui.add_pages({"page1" : some_markdown_text}), it won't reference "page1". So I think the correct example should be:

<|navbar|lov={[("/page1", "Page 1"), ("http://www.google.com", "Google")]}|>

It took me over an hour to figure this out!!

Acceptance Criteria

• [ ] Ensure new code is unit tested, and check code coverage is at least 90%
• [ ] Propagate any change on the demos and run all of them to ensure there is no breaking change
• [ ] Ensure any change is well documented

[FlorianJacta]

You are right @Dr-Irv! I am putting this issue to high priority as it could be pretty frustrating.

[Satoshi-Sh]

I can take on this issue. This should be taipy-doc repo, right?

[FlorianJacta]

@FabienLelaquais @FredLL-Avaiga Is this behavior planned to be changed?