decline word

1. Add dependency:

cargo add decline-word

2. Use:

```rust let value = declinefornum(12412, &("минута", "минуты", "минут")); println!("{value}");

let value = declinefornum(387222, &("рубль", "рубля", "рублей")); println!("{value}"); ```

Output:

shell минут рубля