Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/dialoguer/examples/password.rs

@@ -0,0 +1,18 @@
+use dialoguer::{theme::ColorfulTheme, Password};
+
+fn main() {
+    let password = Password::with_theme(&ColorfulTheme::default())
+        .with_prompt("Password")
+        .with_confirmation("Repeat password", "Error: the passwords don't match.")
+        .validate_with(|input: &String| -> Result<(), &str> {
+            if input.len() > 3 {
+                Ok(())
+            } else {
+                Err("Password must be longer than 3")
+            }
+        })
+        .interact()
+        .unwrap();
+
+    println!("Your password is {} characters long", password.len());
+}