Update CMake configuration and CI workflows for improved compatibility and testing

- Updated minimum CMake version requirement from 3.5 to 3.16 to leverage new features and policies.
- Enhanced CI workflows to include additional build configurations for Ubuntu and macOS, improving cross-platform support.
- Added conditional linking for ImGui Test Engine in the CMakeLists, allowing for UI testing when enabled.
- Refactored CMake commands in CI to ensure consistent policy version handling and streamlined build processes.
- Introduced new constructors for MenuItem in the GUI to enhance menu item management and flexibility.

cmake/absl.cmake

@@ -12,7 +12,7 @@ else()
   endif()
 endif()
 set(ABSL_PROPAGATE_CXX_STD ON)
-set(ABSL_CXX_STANDARD 17)
+set(ABSL_CXX_STANDARD 23)
 set(ABSL_USE_GOOGLETEST_HEAD ON)
 set(ABSL_ENABLE_INSTALL ON)
 set(
@@ -29,4 +29,47 @@ set(
   absl::raw_logging_internal
   absl::failure_signal_handler
   absl::flat_hash_map
+  absl::str_format_internal
+  absl::cord
+  absl::hash
+  absl::synchronization
+  absl::time
+  absl::symbolize
+  absl::debugging_internal
+  absl::demangle_internal
+  absl::strings_internal
+  absl::city
+  absl::cordz_functions
+  absl::malloc_internal
+  absl::graphcycles_internal
+  absl::str_format_internal
+  absl::cord_internal
+  absl::cordz_handle
+  absl::cordz_info
+  absl::flags_commandlineflag
+  absl::flags_commandlineflag_internal
+  absl::flags_marshalling
+  absl::flags_private_handle_accessor
+  absl::flags_program_name
+  absl::flags_config
+  absl::flags_reflection
+  absl::flags_internal
+  absl::hashtablez_sampler
+  absl::raw_hash_set
+  absl::int128
+  absl::time_zone
+  absl::exponential_biased
+  absl::civil_time
+  absl::bad_optional_access
+  absl::bad_variant_access
+  absl::throw_delegate
+  absl::log_severity
+  absl::spinlock_wait
+  absl::strerror
+  absl::raw_hash_set
+  absl::flags_internal
+  absl::cord
+  absl::city
+  absl::hash
+  absl::strings_internal
 )