Use .and() syntax by default with .where(BiFunction) and .nested() predicate

Follows up on

The .where(BiFunction) syntax uses a bool predicate:

But most of the time, I expect people will want an and, and we just introduced a simpler syntax for and predicates ( ).

It would probably be better to use the and syntax there:

Similarly, the current syntax for adding clauses to a nested predicate is that of the bool predicate:

However, most of the time one will simply want an and inside the nested predicate: an or would be equivalent to not using the nested predicate to begin with, and advanced features of the bool predicate are… well, for advanced users.

We should probably use an (implicit) and there as well: