feat: add retranslate

__translate/retranslate/src/main.rs

@@ -0,0 +1,13 @@
+use libretranslate::Language;
+use libretranslate::translate;
+
+fn main() {
+    let source = Language::Chinese;
+    let target = Language::English;
+    let input = "我是中国人";
+
+    let data = translate(Some(source), target, input).unwrap();
+
+    println!("Input {}: {}", data.source.as_pretty(), data.input);
+    println!("Output {}: {}", data.target.as_pretty(), data.output);
+}