add an example

examples in rust are tested in tests (easy to maintain) and and are a good tool for supporting users. since we won't have full docs for release, i think we should offer 2-3 examples of using the libary. @vkrasnov - do you think this is something you could do today?

Start by locating the Rust examples and the tests that exercise them, since the issue identifies those as the maintenance approach. Add 2–3 examples showing how to use the library, and verify that the examples are covered by the relevant tests.

Written by the indexing model from the issue text.