chore: add output implementations for gltf and glb

src/ObjWriting/XModel/Gltf/GltfTextOutput.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "GltfOutput.h"
+
+#include <ostream>
+
+namespace gltf
+{
+    class TextOutput final : public Output
+    {
+    public:
+        explicit TextOutput(std::ostream& stream);
+
+        std::optional<std::string> CreateBufferUri(const void* buffer, size_t bufferSize) const override;
+        void EmitJson(const nlohmann::json& json) const override;
+        void EmitBuffer(const void* buffer, size_t bufferSize) const override;
+        void Finalize() const override;
+
+    private:
+        std::ostream& m_stream;
+    };
+} // namespace gltf