WindowsInstaller: multiple improvements and fixes

move windowsinstaller to /package
update artwork
adapt to conda builds
make msvc redist directory optional
automate version information definition
use relative directories for file locations definitions
improve/update readme
partially update Delete.bat for qt6 libpack
add .gitignore
update signing.bat and add hashing command

WindowsInstaller: use --safe-mode in freecadcmd commands [skip ci]

WindowsInstaller: make windows 8 the minimum version [skip ci]

WindowsInstaller: allow configuring some values via command line

windows installer update for qt6 build

package/WindowsInstaller/include/gui.nsh

@@ -0,0 +1,100 @@
+/*
+
+gui.nsh
+
+Installer user interface settings
+
+*/
+
+#--------------------------------
+# General
+
+Name "${APP_NAME} ${APP_VERSION}"
+BrandingText " "
+
+#--------------------------------
+# Interface settings
+
+!define MUI_ABORTWARNING
+!define MUI_ICON "${SETUP_ICON}"
+!define MUI_UNICON "${SETUP_ICON}"
+!define MUI_HEADERIMAGE
+!define MUI_HEADERIMAGE_BITMAP "${SETUP_HEADERIMAGE}"
+!define MUI_HEADERIMAGE_RIGHT
+!define MUI_WELCOMEFINISHPAGE_BITMAP "${SETUP_WIZARDIMAGE}"
+!define MUI_UNWELCOMEFINISHPAGE_BITMAP "${SETUP_WIZARDIMAGE}"
+
+#--------------------------------
+# Pages
+
+# Installer
+
+# Welcome page
+!define MUI_WELCOMEPAGE_TEXT $(TEXT_WELCOME)
+!insertmacro MUI_PAGE_WELCOME
+# Show the license.
+!define MUI_LICENSEPAGE_BUTTON $(^NextBtn)
+!define MUI_LICENSEPAGE_TEXT_BOTTOM " "
+!insertmacro MUI_PAGE_LICENSE "${FILES_LICENSE}"
+
+# Select install mode
+# set custom function for additional checks after the user selected the install mode
+# note: will not be called in silent mode
+!define MULTIUSER_PAGE_CUSTOMFUNCTION_LEAVE PostMultiUserPageInit
+!insertmacro MULTIUSER_PAGE_INSTALLMODE
+
+# Specify the installation directory.
+!insertmacro MUI_PAGE_DIRECTORY
+
+# Define which components to install.
+!insertmacro MUI_PAGE_COMPONENTS
+
+# Specify where to install program shortcuts.
+!define MUI_STARTMENUPAGE_REGISTRY_VALUENAME "Start Menu Folder"
+!define MUI_STARTMENUPAGE_DEFAULTFOLDER "${APP_DIR}"
+!insertmacro MUI_PAGE_STARTMENU ${APP_NAME} $StartmenuFolder
+
+# Watch the components being installed.
+!insertmacro MUI_PAGE_INSTFILES
+
+# The option to run FreeCAD from the finish page is currently disabled because
+# it may run with Administrator privileges, therefore causing a different
+# user directory to be used. This could be fixed by creating a separate
+# process without UAC elevation.
+#!define MUI_FINISHPAGE_RUN_TEXT "$(FinishPageRun)"
+#!define MUI_FINISHPAGE_RUN "$INSTDIR\${APP_RUN}"
+
+!define MUI_FINISHPAGE_SHOWREADME
+!define MUI_FINISHPAGE_SHOWREADME_NOTCHECKED
+!define MUI_FINISHPAGE_SHOWREADME_FUNCTION StartFreeCAD
+!define MUI_FINISHPAGE_SHOWREADME_TEXT $(FinishPageRun)
+!define MUI_FINISHPAGE_LINK $(TEXT_FINISH_WEBSITE)
+!define MUI_FINISHPAGE_LINK_LOCATION "https://www.freecad.org/"
+#!define MUI_PAGE_CUSTOMFUNCTION_SHOW CheckDesktopShortcut
+!insertmacro MUI_PAGE_FINISH
+
+# Uninstaller
+
+!insertmacro MUI_UNPAGE_WELCOME
+!insertmacro MUI_UNPAGE_CONFIRM
+!insertmacro MUI_UNPAGE_COMPONENTS
+!insertmacro MUI_UNPAGE_INSTFILES
+
+!insertmacro MUI_UNPAGE_FINISH
+
+#--------------------------------
+# Installer Languages
+
+!include lang\TranslatedLanguages.nsh
+
+#--------------------------------
+# Version information
+
+VIProductVersion "${APP_VERSION_NUMBER}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductName" "${APP_NAME}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductVersion" "${APP_DIR}.${APP_VERSION_PATCH}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "FileDescription" "${APP_INFO}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "FileVersion" "${APP_VERSION}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalCopyright" "${APP_COPYRIGHT}"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "CompanyName" "${APP_NAME} Team"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalTrademarks" ""