feat: add session based command history

src/main.rs

@@ -6,6 +6,7 @@ mod prompt;
 
 use crate::error::ShellError;
 use execute::interpret;
+use rustyline::config::Configurer;
 use rustyline::error::ReadlineError;
 use rustyline::{Editor, Result};
 
@@ -18,6 +19,7 @@ fn main() -> Result<()> {
     });
 
     let mut rl = Editor::<()>::new()?;
+    rl.set_auto_add_history(true);
 
     let mut prompt = Prompt::new();