minor: yugioh support added

core/include/ccm/games/yugioh/YuGiOhSetSource.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+// YuGiOhSetSource: ISetSource implementation for Yu-Gi-Oh via YGOPRODeck.
+
+#include "ccm/games/IGameModule.hpp"
+#include "ccm/ports/IHttpClient.hpp"
+
+namespace ccm {
+
+class YuGiOhSetSource final : public ISetSource {
+public:
+    static constexpr const char* kEndpoint = "https://db.ygoprodeck.com/api/v7/cardsets.php";
+
+    explicit YuGiOhSetSource(IHttpClient& http);
+
+    Result<std::vector<Set>> fetchAll() override;
+    static Result<std::vector<Set>> parseResponse(const std::string& body);
+
+private:
+    IHttpClient& http_;
+};
+
+}  // namespace ccm