Searching multiple columns with one URL parameter in laravel-query-builder

laravel-query-builder v7.3.0 introduces `AllowedFilter::groupOr()` and `AllowedFilter::groupAnd()`, allowing multiple column filters to be grouped under a single URL parameter. This solves a common SQL operator precedence bug where using a custom callback filter with OR conditions could leak across AND clauses, returning incorrect results. The new group filters automatically wrap their conditions in parentheses, ensuring correct query logic. The release is fully non-breaking.