refactor(get_command): spawn rustyline instance from main()

src/cli.rs

@@ -1,11 +1,5 @@
-use rustyline::DefaultEditor;
+use rustyline::{Editor, history::FileHistory};
 
-pub fn read_input() -> Option<String> {
-    let mut rl = DefaultEditor::new().ok()?;
-
-    let readline = rl.readline("osdb> ");
-    match readline {
-        Ok(line) => Some(line),
-        Err(_) => None,
-    }
+pub fn read_input(rl: &mut Editor<(), FileHistory>) -> Option<String> {
+    rl.readline("osdb> ").ok()
 }