docs(filters): document enhanced QueryParameter syntax and new filter usage

- Updated documentation to promote the `QueryParameter` attribute over `ApiFilter`, as the latter is deprecated and scheduled for removal in API Platform 5.0.

- Added examples for Date, Boolean, Numeric, Range, Exists, and Order filters using the `QueryParameter` approach. Included notes on configuring custom strategies, handling null values, and enabling filters for nested properties.

Author: vinceAmstoutz