Update to Smarty 5.7.0

Fix tests for translations, where missing in the po/mo files
Add original and post translation for compare for outside and inside smarty translation

Update documentation and only keep the git update path, the others are deprecated

Update phpunit to v11 and update tests according to this, including updated test template data file

Add the tools folder to git ignore

test/includes/locale/ja_JP.frontend.UTF-8.po

@@ -23,5 +23,8 @@ msgstr "Translated"
 msgid "Original with string: %1"
 msgstr "Translated with string: %1"
 
+msgid "Are we translated?"
+msgstr "Yes, we are translated!"
+
 #msgid ""
 #msgstr ""