No support for `UHUGEINT` (`u128`) in `FromSql` trait

[nmlt]

It seems like support for u128 was forgotten, as u64 and i128 are supported. Is the fix as easy as adding from_sql_integral!(u128); to this file?

Edit: It's also missing for the ToSql trait.

I fixed it by following the compiler advice, but now I'll first check whether it actually works in my project. Then I'll submit a pull request.

[nmlt]

Hmm, looks like UHUGEINT was just added?

Anyway I'm getting a runtime crash with my code when it callsffi::duckdb_bind_uhugeint.

[Mause]

Unfortunately UHugeInt isn't yet supported in the arrow layer in DuckDB, but binding support would be good to have in the interim

[cipriancraciun]

@Mause any update on adding support for u128 / uhugeint at least to the SQL translation layer? (I.e. FromSql / ToSql.) Would patches be accepted (assuming it's not that complicated to implement)?

Given that u128 is a common underlying format for lots of data types (like for example raw UUID's, raw IPv6, MD5 and other hashes, etc.) it would be nice to be able to store them without converting to / from i128. (I know some of these, like UUID, has a native DuckDB SQL type. However, when using a "portable" schema, like for example compatible with SQLite, using u128 is the only option.)