Change `parse_duration` onto parsing using `humantime`

[ikripaka]

Describe the feature

The idea of this issue is to replace manual parsing with humantime, so it accepts any possible duration notation.

pub fn parse_duration(s: &str) -> Result<i64, Error> {
    let s = s.trim();
    if s.is_empty() {
        return Err(Error::Config("Empty duration".to_string()));
    }

    let (num_str, unit) = s.split_at(s.len() - 1);
    let num: i64 = num_str
        .parse()
        .map_err(|_| Error::Config(format!("Invalid duration number: {num_str}")))?;

    let multiplier = match unit {
        "s" => 1,
        "m" => 60,
        "h" => 3600,
        "d" => 86_400,
        "w" => 604_800,
        _ => return Err(Error::Config(format!("Invalid duration unit: {unit}. Use s/m/h/d/w"))),
    };

    Ok(num * multiplier)
}

Link to the code.

[KyrylR]

Yes, let's do it