Implement Some Tokio Tutorials

Tutorial/CreateFile.rs

@@ -0,0 +1,14 @@
+#![allow(non_snake_case)]
+
+use tokio::fs::File;
+use tokio::io;
+
+#[tokio::main]
+async fn main() -> io::Result<()> {
+    let mut reader: &[u8] = b"hello";
+    let mut file = File::create("File.txt").await?;
+
+    io::copy(&mut reader, &mut file).await?;
+
+    Ok(())
+}