feat(icons): Use Ocaml logo, add .mli, .mll, .mly

Replace .ml icon with actual Ocaml logo and add .mli, .mll, .mly

src/output/icons.rs

@@ -259,7 +259,10 @@ pub fn icon_for_file(file: &File<'_>) -> char {
             "lzma"          => '\u{f410}', // 
             "lzo"           => '\u{f410}', // 
             "m"             => '\u{e61e}', // 
-            "ml"            => '\u{1d77a}',// 𝝺
+            "ml"            => '\u{e67a}', // 
+            "mli"           => '\u{e67a}', // 
+            "mll"           => '\u{e67a}', // 
+            "mly"           => '\u{e67a}', // 
             "mm"            => '\u{e61d}', // 
             "m4a"           => '\u{f001}', // 
             "markdown"      => '\u{f48a}', // 