feat: add sty file

Signed-off-by: Matthew Gleich <git@mattglei.ch>

src/output/icons.rs

@@ -292,6 +292,7 @@ pub fn icon_for_file(file: &File<'_>) -> char {
             "so"            => '\u{f17c}', // 
             "sql"           => '\u{f1c0}', // 
             "sqlite3"       => '\u{e7c4}', // 
+            "sty"           => '\u{f034}', // 
             "styl"          => '\u{e600}', // 
             "stylus"        => '\u{e600}', // 
             "svg"           => '\u{f1c5}', // 