made seperated source folders for sdk

src/discord-game-sdk-cpp/relationship_manager.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "types.h"
+
+namespace discord {
+
+class RelationshipManager final {
+public:
+    ~RelationshipManager() = default;
+
+    void Filter(std::function<bool(Relationship const&)> filter);
+    Result Count(std::int32_t* count);
+    Result Get(UserId userId, Relationship* relationship);
+    Result GetAt(std::uint32_t index, Relationship* relationship);
+
+    Event<> OnRefresh;
+    Event<Relationship const&> OnRelationshipUpdate;
+
+private:
+    friend class Core;
+
+    RelationshipManager() = default;
+    RelationshipManager(RelationshipManager const& rhs) = delete;
+    RelationshipManager& operator=(RelationshipManager const& rhs) = delete;
+    RelationshipManager(RelationshipManager&& rhs) = delete;
+    RelationshipManager& operator=(RelationshipManager&& rhs) = delete;
+
+    IDiscordRelationshipManager* internal_;
+    static IDiscordRelationshipEvents events_;
+};
+
+} // namespace discord