i18n issue with noun suffixes for .humanize(only_distance=True)

The current i18n implementation doesn't allow enough granularity for languages with noun suffixes like Hungarian. In Hungarian, "17 years" would be translated as "17 év". However, "17 years ago" is translated as "17 év**vel ezelőtt**", and calling `.humanize()` with `only_distance=True` returns a construct that makes no sense by itself:

```
>>> arrow.get('2000-01-01').humanize(locale='hu_HU', only_distance=True)
'17 évvel'
```

Reproduce the shown arrow.get(...).humanize(locale='hu_HU', only_distance=True) example, then trace the .humanize() i18n implementation and Hungarian locale data. Done means only_distance=True produces a standalone, grammatically valid Hungarian distance while preserving the full “years ago” wording.

Written by the indexing model from the issue text.