Extend documentation for each kind of driver, notably add examples of Rust drivers

[rrmhearts]

Please contribute! Quality content that can make this repository more helpful is encouraged. Rust driver examples are welcome!

This issue is to encourage contributions, especially for examples of Rust drivers.

[dujingning]

But,rust is useless for most of us.

[rrmhearts]

Added some Rust documentation, but is it any good? Tell me!