Support NavLinkMatch enum in BSNavLink

[chucker]

Blazor 3.2 added the ability to specify that the nav link's href should match a prefix of the current URL, rather than the entire URL, so you can do something like:

<NavLink href="Recipes" Match="NavLinkMatch.Prefix">

And go to Recipes?id=123 and have the link still show as active.

BSNavLink currently only supports the old behavior where the entire URL needs to match.