Package qtquickdesigner-components directly in the project

Package qtquickdesigner-components directly in the project

Currently we use FetchContent in CMake to fetch the qtquickdesigner-components directly from git.
This can fail if no git is installed or there is no network connection etc.

Instead the qtquickdesigner-components are supposed to be shipped as part of the Qt Design Studio Package.

Then when generating the project (the first) time we can copy the source code as is into the project. No git required.

location of the qtquickdesigner-components source inside the Qt Design Studio package?

*TBD: *I see two options:

(1)
macOS: QCoreApplication::applicationDirPath() + "/../Resources/designer-components"
windows/linux: QCoreApplication::applicationDirPath() + "/../designer-components"

But this would make developers live harder since the source would be added as a packaging step and usualy developers would not have it available.

(2)
We add subrepo in qtquickdesigner that copies the sources to qtcreator\share\qtcreator\qmldesigner. This way they would be available for every developer and no extra packaging test is requried. This is my prefered solution. tjenssen.

I suggest calling the folder designer-components instead of qtquickdesigner-components.
This name is shorter and qtquickdesigner is not any official name anymore.

The source folder is than simply copied to <ProjectName>/designer-components. No checkout/git required and it can still be build as part of the project. The components will now be part of the source directory.

### This file is automatically generated by Qt Design Studio.
### Do not change

message("Building designer components.")

set(QT_QDS_COMPONENTS_NOWARN on)
set(QT_QML_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/qml")

### Since qmlcomponents.cmake is included this should be still relative to the root folder
add_subdirectory(designer-components) 

target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE
    QuickStudioComponentsplugin
    QuickStudioDesignEffectsplugin
    QuickStudioEffectsplugin
    QuickStudioApplicationplugin
    FlowViewplugin
    QuickStudioLogicHelperplugin
    QuickStudioMultiTextplugin
    QuickStudioEventSimulatorplugin
    QuickStudioEventSystemplugin
    QuickStudioUtilsplugin
)

target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE
  BUILD_QDS_COMPONENTS=true
)