Initial vendor packages

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

vendor/indicatif/examples/iterator.rs

@@ -0,0 +1,31 @@
+use std::thread;
+use std::time::Duration;
+
+use indicatif::{ProgressBar, ProgressIterator, ProgressStyle};
+
+fn main() {
+    // Default styling, attempt to use Iterator::size_hint to count input size
+    for _ in (0..1000).progress() {
+        // ...
+        thread::sleep(Duration::from_millis(5));
+    }
+
+    // Provide explicit number of elements in iterator
+    for _ in (0..1000).progress_count(1000) {
+        // ...
+        thread::sleep(Duration::from_millis(5));
+    }
+
+    // Provide a custom bar style
+    let pb = ProgressBar::new(1000);
+    pb.set_style(
+        ProgressStyle::with_template(
+            "{spinner:.green} [{elapsed_precise}] [{bar:40.cyan/blue}] ({pos}/{len}, ETA {eta})",
+        )
+        .unwrap(),
+    );
+    for _ in (0..1000).progress_with(pb) {
+        // ...
+        thread::sleep(Duration::from_millis(5));
+    }
+}