Mention that the old Filter classes are still used as filters

[KDederichs]

While trying to understand the new filter system I've run into an issue where I tried to get it to filter a date time property without using the old DateFiltersince the docs kinda read like those are going away.

Turns out though you still need to use those as parameters of the QueryParameter annotation, like this:

#[QueryParameter(key: 'createdAt', filter: new DateFilter())]

The docs on that are REALLY confusing since that's mentioned nowhere (as far as I can tell).

So some more examples and a list of possible filter types would be great.
Alternatively it could also be helpful if it inferred the filter type from the parameter you're trying to filter cause in my case the DateTimeImmutable property resulted in an equal filter which is not very useful.