Removes the panic, throws a warning & returns an empty list, which sh…

…ould be expected behavior (#73)

* refactor(errors): better message when languaage directory doesn't exist

* refactor(languages_errors): better approach to the languages directory

src/main.rs

@@ -191,8 +191,13 @@ fn main() -> crossterm::Result<()> {
     }
 
     if opt.list_languages {
-        opt.languages()
-            .expect("Couldn't get installed languages under config directory. Make sure the config directory exists.")
+        match opt.languages() {
+            Ok(languages) => languages,
+            Err(_) => {
+                println!("Warning: Couldn't get installed languages under config directory. Make sure the config directory exists.");
+                vec![]
+            }
+        }
             .iter()
             .for_each(|name| println!("{}", name.to_str().expect("Ill-formatted language name.")));
         return Ok(());