LibLine: Read configuration from a config file

Author: https://github.com/alimpfard
Commit: d0aab41628
Pull-request: https://github.com/SerenityOS/serenity/pull/3193

Shell/main.cpp

@@ -176,7 +176,7 @@ int main(int argc, char** argv)
     }
 #endif
 
-    editor = Line::Editor::construct(Line::Configuration {});
+    editor = Line::Editor::construct();
 
     auto shell = Shell::construct();
     s_shell = shell.ptr();