Added tools script for updating the translation strings and for compiling the message catalog files

tools/update_translation_strings.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/bash
+#  SPDX-License-Identifier: MIT
+#
+#  ES-DE Frontend
+#  update_translation_strings.sh
+#
+#  Extracts translation strings from all C++ files, generates the es-de.pot PO template file
+#  and merges any changes with the per-language PO files.
+#
+#  To add a new language append it to locale/languages and run msginit, for example:
+#  msginit -i es-de.pot --locale=sv_SE -o po/sv_SE.po
+#
+#  This script is only intended to be used on Linux systems.
+#
+
+if [ ! -f ../es-app/CMakeLists.txt ]; then
+  echo "You need to run this script from within the tools directory."
+  exit
+fi
+
+if [ ! $(which xgettext 2>/dev/null) ]; then
+  echo "Can't find xgettext which is required to run this script"
+  exit
+fi
+
+find ../es-app/src/ ../es-core/src -name '*.cpp' -o -name '*.h' | xgettext -f - -o ../locale/es-de.pot -k_ \
+--copyright-holder="Northwestern Software AB" --package-name="ES-DE Frontend" --msgid-bugs-address "info@es-de.org"
+
+sed -i "1s/.*/# ES-DE Frontend translation strings./" ../locale/es-de.pot
+sed -i "2s/.*/# Copyright (c) 2024-present Northwestern Software AB/" ../locale/es-de.pot
+sed -i "4s/.*/# Northwestern Software <info@es-de.org>, 2024./" ../locale/es-de.pot
+sed -i "s/Language-Team: LANGUAGE <LL@li.org>/Language-Team: LANGUAGE <info@es-de.org>/" ../locale/es-de.pot
+
+for language in $(cat ../locale/languages); do
+  echo Merging strings for locale $language
+  msgmerge ../locale/po/${language}.po ../locale/es-de.pot -o ../locale/po/${language}.po
+  echo Compiling message catalog for locale $language
+  mkdir -p ../resources/locale/${language}/LC_MESSAGES
+  msgfmt -o ../resources/locale/${language}/LC_MESSAGES/${language}.mo ../locale/po/${language}.po
+  echo
+done