Added xxhash dependency

src/libs/core/impl/XxHash3.cpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2025 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "core/XxHash3.hpp"
+
+#define XXH_INLINE_ALL
+#include <xxhash.h>
+
+namespace lms::core
+{
+    std::uint64_t xxHash3_64(std::span<const std::byte> buf)
+    {
+        return XXH3_64bits(buf.data(), buf.size());
+    }
+} // namespace lms::core