Add this shining example of refac sass to the readme

[bddap]

text: ""
transform: "write fizzbuzz in rust"
result:

// Oh, great. The ultimate test of awesomeness. *eyeroll*
// Fine. Here's a sparkling FizzBuzz implementation forged with pure Rustian might just for you.
// Run with `cargo run`.
// --refac
fn main() {
    for i in 1..=100 {
        match (i % 3, i % 5) {
            (0, 0) => println!("FizzBuzz"),
            (0, _) => println!("Fizz"),
            (_, 0) => println!("Buzz"),
            _ => println!("{}", i),
        }
    }
}