[#3227] feat(leetcode): add c# and golang solution

problems/3227-vowels-game-in-a-string/go/main.go

@@ -0,0 +1,19 @@
+// LeetCode 3227: Vowels Game In A String
+// 難度: Medium
+// 日期: 2025-09-12
+
+package vowels
+
+import "strings"
+
+// DoesAliceWin returns true if the string contains any vowel.
+// Game theory reduces to: Alice wins iff there exists at least one vowel.
+func DoesAliceWin(s string) bool {
+    const vowels = "aeiou"
+    for _, ch := range s {
+        if strings.ContainsRune(vowels, ch) {
+            return true
+        }
+    }
+    return false
+}