Core: add CMake functions to create .qm out of .ts files

cMake/FreeCAD_Helpers/SetupQt.cmake

@@ -15,7 +15,7 @@ if(BUILD_GUI)
             list (APPEND FREECAD_QT_COMPONENTS WinExtras)
         endif()
     endif()
-    list (APPEND FREECAD_QT_COMPONENTS OpenGL PrintSupport Svg UiTools Widgets)
+    list (APPEND FREECAD_QT_COMPONENTS OpenGL PrintSupport Svg UiTools Widgets LinguistTools)
     if (BUILD_WEB)
         list (APPEND FREECAD_QT_COMPONENTS WebEngineWidgets)
     endif()
@@ -62,4 +62,26 @@ if (Qt${FREECAD_QT_MAJOR_VERSION}Core_VERSION VERSION_LESS 5.15.0)
         qt5_wrap_cpp("${outfiles}" ${ARGN})
         set("${outfiles}" "${${outfiles}}" PARENT_SCOPE)
     endfunction()
+
+    function(qt_add_translation _qm_files)
+        qt5_add_translation("${_qm_files}" ${ARGN})
+        set("${_qm_files}" "${${_qm_files}}" PARENT_SCOPE)
+    endfunction()
 endif()
+
+function(qt_find_and_add_translation _qm_files _tr_dir _qm_dir)
+    file(GLOB _ts_files ${_tr_dir})
+    set_source_files_properties(${_ts_files} PROPERTIES OUTPUT_LOCATION ${_qm_dir})
+    qt_add_translation("${_qm_files}" ${_ts_files})
+    set("${_qm_files}" "${${_qm_files}}" PARENT_SCOPE)
+endfunction()
+
+function(qt_create_resource_file outfile)
+    set(QRC "<RCC>\n  <qresource>\n")
+    foreach (it ${ARGN})
+        get_filename_component(qmfile "${it}" NAME)
+        string(APPEND QRC "        <file>translations/${qmfile}</file>")
+    endforeach()
+    string(APPEND QRC "  </qresource>\n</RCC>\n")
+    file(WRITE ${outfile} ${QRC})
+endfunction()