chore: add helper-scripts for release process

Co-authored-by: barth23 <florian.barth@uni-goettingen.de>
Co-authored-by: sendler <sendler@sub.uni-goettingen.de>

prepare

+#!/bin/bash
+
+export RELEASE_VERSION=$1
+
+echo "Building $RELEASE_VERSION ..."
+ant
+exit $?

publish

+#!/bin/bash
+
+export FILE=$1
+
+echo "Uploading $FILE ..."
+curl -u ci:${EXIST_UPLOAD_PW} -X POST -F file=@${FILE} https://ci.de.dariah.eu/exist-upload
+exit $?