Add schemars support

[wojciech-graj]

The implementation is based on
https://docs.rs/schemars/latest/src/schemars/json_schema_impls/arrayvec07.rs.html

[Lokathor]

the inference errors that adding support for this crate generates are somewhat a stability concern. however, the new impls are behind a cargo feature so i think it's not a problem in practice.

[wojciech-graj]

the inference errors that adding support for this crate generates are somewhat a stability concern. however, the new impls are behind a cargo feature so i think it's not a problem in practice.

Yep, it should be fine since it's feature gated. Plus if the rust compiler can get away with breaking type inference changes, surely we can too ;)

I'll push a commit that fixes the CI.

[Lokathor]

released in tinyvec-1.12, very sorry this got forgotten about!

[wojciech-graj]

No worries. Thanks for merging it.