refactor: reorganize Resources module into Core/Asset, Core/IO and Resources subdirectories

- Split core resource architecture into Core/Asset/ (IResource, ResourceManager, ResourceCache, etc.)
- Moved IO layer into Core/IO/ (IResourceLoader, ResourceFileSystem, etc.)
- Reorganized concrete resource types into Resources/{Texture,Mesh,Material,Shader,AudioClip}/
- Updated all include paths from relative to <XCEngine/...> format
- Fixed circular dependency in Material.h (removed unnecessary ResourceManager.h include)
- Fixed malformed include syntax in ResourceManager.h and AsyncLoader.h
- Fixed glad.h path issues in CMakeLists.txt

engine/src/Resources/AudioClip/AudioClip.cpp

@@ -0,0 +1,31 @@
+#include "Resources/AudioClip.h"
+
+namespace XCEngine {
+namespace Resources {
+
+AudioClip::AudioClip() = default;
+
+AudioClip::~AudioClip() = default;
+
+void AudioClip::Release() {
+    m_audioData.Clear();
+    m_rhiResource = nullptr;
+    m_isValid = false;
+}
+
+void AudioClip::SetAudioData(const Containers::Array<Core::uint8>& data) {
+    m_audioData = data;
+    
+    if (m_sampleRate > 0 && m_channels > 0 && m_bitsPerSample > 0) {
+        size_t bytesPerSample = m_bitsPerSample / 8;
+        size_t totalSamples = data.Size() / bytesPerSample;
+        m_duration = static_cast<float>(totalSamples) / static_cast<float>(m_sampleRate);
+    }
+}
+
+void AudioClip::SetRHIResource(class IRHIAudioBuffer* resource) {
+    m_rhiResource = resource;
+}
+
+} // namespace Resources
+} // namespace XCEngine