rs: add «2997. Minimum Number of Operations to Make Array XOR Equal to K»

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

rs/minimum-number-of-operations-to-make-array-xor-equal-to-k.rs

@@ -0,0 +1,5 @@
+impl Solution {
+    pub fn min_operations(nums: Vec<i32>, k: i32) -> i32 {
+        (k ^ nums.into_iter().reduce(|x, y| x ^ y).unwrap()).count_ones() as i32
+    }
+}