Rewrite project from Python to Rust and add Windows/MacOS supports

src/utils/fs.rs

@@ -0,0 +1,17 @@
+use std::io;
+use std::path::PathBuf;
+
+pub fn check_dir(dir: Option<&str>) -> io::Result<Vec<String>> {
+    let path: PathBuf = match dir {
+        None | Some(".") | Some("./") => std::env::current_dir()?,
+        Some(value) => std::env::current_dir()?.join(value),
+    };
+
+    let mut items = Vec::new();
+    for entry in std::fs::read_dir(path)? {
+        let entry = entry?;
+        items.push(entry.file_name().to_string_lossy().to_string());
+    }
+
+    Ok(items)
+}