core: rename mbgl directories to mln (#4511)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

include/mln/i18n/collator.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <memory>
+#include <string>
+#include <optional>
+
+namespace mln {
+namespace platform {
+
+class Collator {
+public:
+    explicit Collator(bool caseSensitive,
+                      bool diacriticSensitive,
+                      const std::optional<std::string>& locale = std::nullopt);
+    int compare(const std::string& lhs, const std::string& rhs) const;
+    std::string resolvedLocale() const;
+    bool operator==(const Collator& other) const;
+
+private:
+    class Impl;
+    std::shared_ptr<Impl> impl;
+};
+
+} // namespace platform
+} // namespace mln