feat(defaultActive): set correct filter after clicking on clear

[karelhala]

Description

When user clicks on clear filters the previously selected filter remains selected. This is unintuitive as we are basically clearing the whole filter section. This PR fixes it by activating first filter in the list. There's also an option to provide default filter which will be used when consumer provides it and user clears the filters.

Fixes 513

[nicolethoen]

This might benefit from one additional unit test that there is no issue if an invalid defaultActiveFilter is provided.

[nicolethoen]

This useEffect will reset the active filter anytime filterItems changes. If consumers are passing dynamic children (e.g., showing/hiding
filters based on permissions or feature flags), the user's manual filter selection gets reset even if their currently selected filter is still in
the list.

For example:

<DataViewFilters>
  <DataViewTextFilter filterId="name" title="Name" />
  {showAdvanced && <DataViewTextFilter filterId="location" title="Location" />}
</DataViewFilters>

User selects "Name" → toggles advanced filters → filterItems changes → resets back to default filter.

Consider moving this to mount-only or using an initialization flag so it doesn't fire on every children update.