Add OpenGL test infrastructure - Phase 1: Device, Buffer, Fence tests (17 tests)
- Create test directory structure at tests/RHI/OpenGL/
- Implement OpenGLTestFixture with GLFW/GLAD initialization
- Add Device tests: CreateRenderWindow, InitializeWithExistingWindow, GetDeviceInfo, SwapBuffers, PollEvents
- Add Buffer tests: VertexBuffer, IndexBuffer, UniformBuffer, Dynamic, Bind/Unbind, Map/Unmap
- Add Fence tests: Initialize (signaled/unsignaled), Signal, Wait, IsSignaled, GetStatus
- Add CMakeLists.txt with proper GLFW/GLAD/GTest linking
- Create implementation plan document at docs/OpenGL测试实施计划.md
ssdfasd
745f3ab225