Function parse_stylesheet 

pub fn parse_stylesheet(css: &str) -> Stylesheet

解析 CSS 字符串，生成样式表

示例

use iris_cssom::css::parse_stylesheet;

let css = r#"
    .container {
        padding: 20px;
        background-color: white;
    }
     
    #title {
        font-size: 24px;
        color: blue;
    }
"#;

let stylesheet = parse_stylesheet(css);
assert!(!stylesheet.rules.is_empty());