fontique query matching algorithm

Nobody has claimed this yet.

A [`fontique::Query`](https://docs.rs/fontique/latest/fontique/struct.Query.html) currently:

1. Filters available fonts by those matching any family in the given list
2. Extends the list of selected fonts using those matching the fallback script and locale, if provided
3. Finds the "best" match (according to given attributes) in each of the above-selected families *and* the default member of the family (if not equal to the best)

Problems:

- #322: members of a family do not necessarily all cover the same unicode range.
- Locale and script have no impact on font preference, only on available fallbacks.
- Similarly, the font's "functional unicode range" has no impact on font preference (see [here](https://github.com/linebender/parley/pull/377#issuecomment-2955406530), considering arrows which do not use a specific script or locale).
- Query caching is internal, supporting only the last query. In contrast, `kas-text` caches *all* queries.

Start with the fontique::Query documentation and the current query behavior described here, then review issue #322 and the discussion in pull request #377. Compare the existing query cache with kas-text's all-query caching; done should address font coverage, locale/script and functional Unicode range preference, and caching behavior.

Written by the indexing model from the issue text.