Function to_bytesize

pub fn to_bytesize(text: &str) -> usize

Parse human-readable byte size string to usize

Example:

let bytes = rmqtt_utils::to_bytesize("2G512K");
assert_eq!(bytes, 2148007936);

let complex = rmqtt_utils::to_bytesize("1G500M256K1024B");
assert_eq!(complex, 1598292992);