feat: 实现Containers、Memory、Threading核心模块及单元测试

- Containers: String, Array, HashMap 容器实现及测试
- Memory: Allocator, LinearAllocator, PoolAllocator, ProxyAllocator, MemoryManager 实现及测试
- Threading: Mutex, SpinLock, ReadWriteLock, Thread, Task, TaskSystem 实现及测试
- 修复Windows平台兼容性: _aligned_malloc, std::hash特化
- 修复构建错误和测试用例问题

tests/threading/test_spinlock.cpp

@@ -0,0 +1,32 @@
+#include <gtest/gtest.h>
+#include <XCEngine/Threading/SpinLock.h>
+
+using namespace XCEngine::Threading;
+
+namespace {
+
+TEST(Threading_SpinLock, LockUnlock) {
+    SpinLock spinlock;
+    
+    spinlock.Lock();
+    spinlock.Unlock();
+}
+
+TEST(Threading_SpinLock, TryLock_Success) {
+    SpinLock spinlock;
+    
+    bool result = spinlock.TryLock();
+    EXPECT_TRUE(result);
+    spinlock.Unlock();
+}
+
+TEST(Threading_SpinLock, TryLock_AlreadyLocked) {
+    SpinLock spinlock;
+    
+    spinlock.Lock();
+    bool result = spinlock.TryLock();
+    EXPECT_FALSE(result);
+    spinlock.Unlock();
+}
+
+} // namespace