Refactor logging system to switch between stdout and file logging

* Refactor logging to switch between stdout and file logging

* Use "clear" instead of "tput reset" for unix

* Remove redundant comments

engine/src/core/repl/commands.rs

@@ -1,30 +1,28 @@
 use super::COMMAND_LIST;
 use std::process::Command;
-use log2::{debug, info};
+use log::debug;
 
 pub(crate) fn say_hello() {
     println!("Hello, World!");
 }
 
 pub(crate) fn echo(args: Vec<String>) {
-    debug!("{}", args.join(" "));
     println!("{}", args.join(" "))
 }
 
 pub(crate) fn exit() {
-    debug!("Exiting...");
+    println!("Exiting...");
     std::process::exit(0)
 }
 
 pub(crate) fn clear() {
-    info!("Clearing screen..., running command");
+    println!("Clearing screen..., running command");
     let _result = if cfg!(target_os = "windows") {
         debug!("target_os is windows");
         Command::new("cmd").args(["/c", "cls"]).spawn()
     } else {
         debug!("target_os is unix");
-        // "clear" or "tput reset"
-        Command::new("tput").arg("reset").spawn()
+        Command::new("clear").spawn()
     };
 }