chore: integrate Platform.cmake and Flags.cmake into build

- Add platform/compiler detection via Platform.cmake
- Apply warning flags (-Wall -Wextra -Werror) via Flags.cmake
- Link platform-specific libraries (OpenGL32, winmm, dwmapi)

CMakeLists.txt

@@ -7,6 +7,10 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 # Required for find_package injection
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/deps")
 
+# Platform and compiler detection
+include(Platform)
+include(Flags)
+
 # Dependencies
 find_package(fmt REQUIRED)
 find_package(glfw3 REQUIRED)
@@ -24,4 +28,6 @@ add_executable(cuber "cuber.cpp"
 )
 target_include_directories(cuber PRIVATE ".")
 target_compile_features(cuber PRIVATE cxx_std_23)
-target_link_libraries(cuber PRIVATE fmt::fmt glfw::glfw glad::glad asio::asio)
+target_compile_options(cuber PRIVATE ${BASE_OPTIONS})
+target_compile_definitions(cuber PRIVATE ${BASE_DEFINITIONS})
+target_link_libraries(cuber PRIVATE fmt::fmt glfw::glfw glad::glad asio::asio ${BASE_LIBRARIES})