feat: add fast-qr

__misc/fastqr/src/main.rs

@@ -0,0 +1,15 @@
+use fast_qr::convert::ConvertError;
+use fast_qr::qr::QRBuilder;
+
+fn main() -> Result<(), ConvertError> {
+    // QRBuilder::new can fail if content is too big for version,
+    // please check before unwrapping.
+    let qrcode = QRBuilder::new("https://example.com/".into())
+        .build()
+        .unwrap();
+
+    let str = qrcode.to_str(); // .print() exists
+    println!("{}", str);
+
+    Ok(())
+}