rs: add «2108. Find First Palindromic String in the Array»

Signed-off-by: Matej Focko <me@mfocko.xyz>

rs/find-first-palindromic-string-in-the-array.rs

@@ -0,0 +1,14 @@
+impl Solution {
+    fn is_palindrome(word: &str) -> bool {
+        word.chars()
+            .take(word.len() >> 1)
+            .eq(word.chars().rev().take(word.len() >> 1))
+    }
+
+    pub fn first_palindrome(words: Vec<String>) -> String {
+        words
+            .into_iter()
+            .find(|s| Self::is_palindrome(s))
+            .unwrap_or(String::from(""))
+    }
+}