feat: mcp server sdk (#4794)

Signed-off-by: kevin <wanjunfeng@gmail.com>

mcp/util.go

@@ -0,0 +1,15 @@
+package mcp
+
+import (
+	"fmt"
+)
+
+// ptr is a helper function to get a pointer to a value
+func ptr[T any](v T) *T {
+	return &v
+}
+
+// formatSSEMessage formats a Server-Sent Event message with proper CRLF line endings
+func formatSSEMessage(event string, data []byte) string {
+	return fmt.Sprintf("event: %s\r\ndata: %s\r\n\r\n", event, string(data))
+}