feat: 添加独立的输入系统和平台抽象层

- 新增 Platform 模块：PlatformTypes.h, Window.h, WindowsWindow
- 新增 Input 模块：InputTypes, InputEvent, InputAxis, InputModule, InputManager
- 新增 WindowsInputModule 处理 Win32 消息转换
- 将 RHI 集成测试从 render_model 迁移到 sphere
- 更新 CMakeLists.txt 添加 Platform 和 Input 模块

tests/RHI/D3D12/integration/sphere/CMakeLists.txt

@@ -0,0 +1,55 @@
+cmake_minimum_required(VERSION 3.15)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+
+project(D3D12_Sphere)
+
+set(ENGINE_ROOT_DIR ${CMAKE_SOURCE_DIR}/engine)
+
+add_executable(D3D12_Sphere
+    WIN32
+    main.cpp
+)
+
+target_include_directories(D3D12_Sphere PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${ENGINE_ROOT_DIR}/include
+    ${ENGINE_ROOT_DIR}
+)
+
+target_compile_definitions(D3D12_Sphere PRIVATE
+    UNICODE
+    _UNICODE
+)
+
+target_link_libraries(D3D12_Sphere PRIVATE
+    d3d12
+    dxgi
+    d3dcompiler
+    winmm
+    XCEngine
+)
+
+add_custom_command(TARGET D3D12_Sphere POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+        ${CMAKE_CURRENT_SOURCE_DIR}/Res
+        $<TARGET_FILE_DIR:D3D12_Sphere>/Res
+)
+
+add_custom_command(TARGET D3D12_Sphere POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        ${CMAKE_SOURCE_DIR}/tests/RHI/D3D12/integration/compare_ppm.py
+        $<TARGET_FILE_DIR:D3D12_Sphere>/
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        ${CMAKE_SOURCE_DIR}/tests/RHI/D3D12/integration/run_integration_test.py
+        $<TARGET_FILE_DIR:D3D12_Sphere>/
+)
+
+add_test(NAME D3D12_Sphere_Integration
+    COMMAND ${Python3_EXECUTABLE} $<TARGET_FILE_DIR:D3D12_Sphere>/run_integration_test.py
+        $<TARGET_FILE:D3D12_Sphere>
+        screenshot.ppm
+        ${CMAKE_CURRENT_SOURCE_DIR}/GT.ppm
+        5
+    WORKING_DIRECTORY $<TARGET_FILE_DIR:D3D12_Sphere>
+)