Refactor CMakeLists.txt for Qt6 support

Updated CMakeLists.txt to prefer Qt6, added QuickControls2 component, and adjusted executable and QML module configurations.

CMakeLists.txt

@@ -1,34 +1,45 @@
 cmake_minimum_required(VERSION 3.21)
 project(StandardOfIron VERSION 1.0.0 LANGUAGES CXX)
 
+# Prefer Qt6 if both Qt5/Qt6 are installed
+set(QT_DEFAULT_MAJOR_VERSION 6)
+
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
-# Find Qt6
-find_package(Qt6 REQUIRED COMPONENTS Core Widgets OpenGL Quick Qml)
+# ---- Qt ----
+find_package(Qt6 REQUIRED COMPONENTS
+    Core
+    Widgets
+    OpenGL
+    Quick
+    Qml
+    QuickControls2
+)
 
-# Find OpenGL
 find_package(OpenGL REQUIRED)
 
-# Qt6 setup
-qt6_standard_project_setup()
+if(COMMAND qt_standard_project_setup)
+  qt_standard_project_setup()
+elseif(COMMAND qt6_standard_project_setup)
+  qt6_standard_project_setup()
+endif()
 
-# Include directories
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 
-# Add subdirectories
 add_subdirectory(engine)
 add_subdirectory(render)
 add_subdirectory(game)
 add_subdirectory(ui)
 add_subdirectory(tools)
 
-# Main executable
+# ---- Executable ----
 qt6_add_executable(standard_of_iron
     main.cpp
 )
 
+# ---- QML module ----
 qt6_add_qml_module(standard_of_iron
     URI StandardOfIron
     VERSION 1.0
@@ -40,20 +51,23 @@ qt6_add_qml_module(standard_of_iron
         assets/shaders/basic.vert
         assets/shaders/basic.frag
         assets/maps/test_map.txt
+    DEPENDENCIES
+        Qt6::QuickControls2
 )
 
 target_link_libraries(standard_of_iron
     PRIVATE
-    Qt6::Core
-    Qt6::Widgets
-    Qt6::OpenGL
-    Qt6::Quick
-    Qt6::Qml
-    ${OPENGL_LIBRARIES}
-    engine_core
-    render_gl
-    game_systems
+        Qt6::Core
+        Qt6::Widgets
+        Qt6::OpenGL
+        Qt6::Quick
+        Qt6::Qml
+        Qt6::QuickControls2
+        ${OPENGL_LIBRARIES}
+        engine_core
+        render_gl
+        game_systems
 )
 
-# Copy assets to build directory
-file(COPY assets/ DESTINATION ${CMAKE_BINARY_DIR}/assets/)
+# Copy assets next to the binary for dev runs
+file(COPY assets/ DESTINATION ${CMAKE_BINARY_DIR}/assets/)