build system updates and other fixes

add preset config
import qt
separate core and frontend

src/frontend/CMakeLists.txt

@@ -1,3 +1,54 @@
-target_sources(threeSD PRIVATE
-  frontend/main.cpp
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+if (POLICY CMP0071)
+    cmake_policy(SET CMP0071 NEW)
+endif()
+
+add_executable(threeSD
+  main.cpp
+  main.h
+  main.ui
 )
+
+target_link_libraries(threeSD PRIVATE common core)
+target_link_libraries(threeSD PRIVATE Qt5::Widgets)
+target_link_libraries(threeSD PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads)
+
+if (APPLE)
+    # TODO: support macOS
+    # set(MACOSX_ICON "../../dist/citra.icns")
+    # set_source_files_properties(${MACOSX_ICON} PROPERTIES MACOSX_PACKAGE_LOCATION Resources)
+    # target_sources(threeSD PRIVATE ${MACOSX_ICON})
+    # set_target_properties(threeSD PROPERTIES MACOSX_BUNDLE TRUE)
+    # set_target_properties(threeSD PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/Info.plist)
+elseif(WIN32)
+    # compile as a win32 gui application instead of a console application
+    target_link_libraries(threeSD PRIVATE Qt5::WinMain)
+    if(MSVC)
+        set_target_properties(threeSD PROPERTIES LINK_FLAGS_RELEASE "/SUBSYSTEM:WINDOWS")
+    elseif(MINGW)
+        set_target_properties(threeSD PROPERTIES LINK_FLAGS_RELEASE "-mwindows")
+    endif()
+endif()
+
+target_compile_definitions(threeSD PRIVATE
+    # Use QStringBuilder for string concatenation to reduce
+    # the overall number of temporary strings created.
+    -DQT_USE_QSTRINGBUILDER
+
+    # Disable implicit type narrowing in signal/slot connect() calls.
+    -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT
+
+    # Disable unsafe overloads of QProcess' start() function.
+    -DQT_NO_PROCESS_COMBINED_ARGUMENT_START
+
+    # Disable implicit QString->QUrl conversions to enforce use of proper resolving functions.
+    -DQT_NO_URL_CAST_FROM_STRING
+)
+
+if (MSVC)
+    include(CopyQt5Deps)
+    copy_Qt5_deps(threeSD)
+endif()