[#3005] feat(leetcode): init project, add C# solution

problems/3005-count_elements_with_maximum_frequency/go/main.go

@@ -0,0 +1,18 @@
+// LeetCode 3005: Count_elements_with_maximum_frequency
+// 難度: Easy
+// 日期: 2025-09-22
+
+package main
+
+import "fmt"
+
+// TODO: 根據題意調整簽名
+func solve(nums []int) int {
+    return 0
+}
+
+func main() {
+    fmt.Printf("Hello LeetCode 3005!\n")
+    // TODO: 可加入簡單測試
+}
+