feat(cmake): enable export of compile commands for LSP support

- Added option to export compile commands for clangd and other Language Server Protocol (LSP) tools by setting CMAKE_EXPORT_COMPILE_COMMANDS to ON in CMake.
- Updated yaze_test.cc to conditionally include ImGui test engine headers based on the YAZE_ENABLE_IMGUI_TEST_ENGINE flag, improving modularity and organization.

Benefits:
- Enhanced development experience with better integration of LSP tools.
- Improved code organization by managing includes based on feature flags.

CMakeLists.txt

@@ -90,6 +90,9 @@ endif()
 option(YAZE_SUPPRESS_WARNINGS "Suppress compiler warnings (use -v preset suffix for verbose)" ON)
 set(YAZE_TEST_ROM_PATH "${CMAKE_BINARY_DIR}/bin/zelda3.sfc" CACHE STRING "Path to test ROM file")
 
+# Export compile commands for clangd/LSP
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 # Platform detection
 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
     set(YAZE_PLATFORM_MACOS ON)