feat: add function and macro s to convert to String

src/experimental/to_string.rs

@@ -1 +1,15 @@
 //
+#![allow(unused)]
+
+/// Converts the parameter into a [String] using the [Into] trait.
+pub fn s(v: impl Into<String>) -> String {
+    v.into()
+}
+
+/// Converts the parameter into a [String] by calling `.to_string()`.
+#[macro_export]
+macro_rules! s {
+    ($value:expr) => {
+        $value.to_string()
+    };
+}