Add Rust solution for byte_format
Add Rust solution for byte_format

mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview,mre/the-coding-interview