kt: add «11. Container With Most Water»

URL:	https://leetcode.com/problems/container-with-most-water/
Signed-off-by: Matej Focko <me@mfocko.xyz>

kt/container-with-most-water.kt

@@ -0,0 +1,21 @@
+class Solution {
+    fun maxArea(height: IntArray): Int {
+        var foundMax = 0
+
+        var (l, r) = 0 to height.size - 1
+        while (l < r) {
+            foundMax =
+                listOf(
+                    foundMax,
+                    (r - l) * listOf(height[l], height[r]).min(),
+                ).max()
+
+            when {
+                height[l] < height[r] -> l++
+                else -> r--
+            }
+        }
+
+        return foundMax
+    }
+}