distribution: Rust bindings

[asg017]

two options to statically include sqlite-vss into a rust app:

• Automatically download the correct pre-compiled static files at build-time, if the download-sqlite-vss feature is enabled
• Make authors define a LIBSQLITE_VSS variables that points to a build

Inspiro:

• tch-rs: where the torch-sys crate has a download-libtorch feature which uses ureq to download pre-compiled binaries

[jbeuria]

@asg017

Hi, Could you please add one very simple example code for Rust? Thanks for your good work!

[asg017]

@jbeuria I got bindings/rust that is are WIP bindings to sqlite-vss for Rust, and examples/rust which is an example Rust binary that uses it.

It's not complete yet: cargo test in the bindings lib works, but cargo build in the example doesn't work for me for some reason. Once I figure it out I'll push to crates.io