Add script to find missing locales

from fguillot/kanboard#393 and adjusted for miniflux usage

scripts/find-strings.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+REF_LANG=${1:-fr_FR}
+
+###
+APP_DIR=`dirname $0`/../
+LANG_FILE=$APP_DIR/locales/$REF_LANG/translations.php
+TMPFILE=`mktemp`
+
+# find all strings used with t() or e() and write them to a temp buffer
+find $APP_DIR -name '*.php' -print | xargs -n 1 cat | grep -oP -e "\b(t|tne)\((\"\K.*?\"|\'\K.*?\') *[\)\,]" | sed -e "s/'[),]$//" -e 's/\\/\\\\/g' | sort | uniq > $TMPFILE
+
+echo "Missing strings from $REF_LANG: (if none printed, none missing)"
+while read LINE
+do
+ grep -F "'$LINE'" $LANG_FILE > /dev/null
+ if [[ $? -ne 0 ]]; then
+ echo " '$LINE' => '',"
+ fi
+done < $TMPFILE
+
+# delete the work file
+rm $TMPFILE