Get the user's current icon theme on Linux
There isn't a unified standard for getting the current icon theme on Linux.
So linicon-theme attempts to check many places theme information might be
stored. See [the docs](https://docs.rs/linicon-theme) for more details.
```rust
use linicon_theme::get_icon_theme;
println!("Your current icon theme is: {}", get_icon_theme().unwrap());
```