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/CMakeLists.txt

@@ -0,0 +1,31 @@
+# ============================================================
+# Threading Library Tests
+# ============================================================
+
+set(THREADING_TEST_SOURCES
+    test_mutex.cpp
+    test_spinlock.cpp
+    test_task.cpp
+)
+
+add_executable(xcengine_threading_tests ${THREADING_TEST_SOURCES})
+
+if(MSVC)
+    set_target_properties(xcengine_threading_tests PROPERTIES
+        LINK_FLAGS "/NODEFAULTLIB:libcpmt.lib /NODEFAULTLIB:libcmt.lib"
+    )
+endif()
+
+target_link_libraries(xcengine_threading_tests
+    PRIVATE
+    XCEngine
+    GTest::gtest
+    GTest::gtest_main
+)
+
+target_include_directories(xcengine_threading_tests PRIVATE
+    ${CMAKE_SOURCE_DIR}/engine/include
+    ${CMAKE_SOURCE_DIR}/tests/fixtures
+)
+
+add_test(NAME ThreadingTests COMMAND xcengine_threading_tests)