Vendor dependencies

Let's see how I like this workflow.

vendor/crossterm/examples/event-read-char-line.rs

@@ -0,0 +1,45 @@
+//! Demonstrates how to block read characters or a full line.
+//! Just note that crossterm is not required to do this and can be done with `io::stdin()`.
+//!
+//! cargo run --example event-read-char-line
+
+use crossterm::{
+    event::{self, Event, KeyCode, KeyEvent},
+    Result,
+};
+
+pub fn read_char() -> Result<char> {
+    loop {
+        if let Event::Key(KeyEvent {
+            code: KeyCode::Char(c),
+            ..
+        }) = event::read()?
+        {
+            return Ok(c);
+        }
+    }
+}
+
+pub fn read_line() -> Result<String> {
+    let mut line = String::new();
+    while let Event::Key(KeyEvent { code, .. }) = event::read()? {
+        match code {
+            KeyCode::Enter => {
+                break;
+            }
+            KeyCode::Char(c) => {
+                line.push(c);
+            }
+            _ => {}
+        }
+    }
+
+    Ok(line)
+}
+
+fn main() {
+    println!("read line:");
+    println!("{:?}", read_line());
+    println!("read char:");
+    println!("{:?}", read_char());
+}