few changes

src/elements.rs

@@ -0,0 +1,13 @@
+use crate::Widget;
+
+impl Widget for &str {
+    fn render(&self) -> String {
+        self.to_string()
+    }
+}
+
+impl Widget for String {
+    fn render(&self) -> String {
+        self.clone()
+    }
+}