Add install files

.gitignore

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+pkg/
+src/
+*.tar.gz
+*.tgz
+*.zst

PKGBUILD

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+# Maintainer: Manuel Thalmann <m@nuth.ch>
+pkgname='elo-23-lts'
+pkgdesc='ELO Java Client v23 LTS'
+pkgver='23.00.013'
+pkgrel='1'
+arch=(any)
+url=https://elo.com
+source=(file:./ELO_Java_Client_Linux_23_00_013_183.tar.gz)
+sha256sums=('679a27862b6d06b3f36ffb6d4871d3b0680322ea848f60bf54b182daa0aa3ab7')
+depends=(java-runtime)
+
+package() {
+    install -d $pkgdir/opt/elo-23-lts $pkgdir/usr/share/applications
+    cp -art $pkgdir/opt/elo-23-lts ELO_Java_Client_Linux/ELOclient/*
+    install -Dm555 ./ELO_Java_Client_Linux/ELOclient/ELOclient.sh $pkgdir/opt/elo-23-lts
+
+    sed \
+        -e "s/\/usr\/ELOjavaclient/\/opt\/elo-23-lts/" \
+        -e "s/^\(Name=\).*/\1ELO Java Client 23 LTS/" \
+        "ELO_Java_Client_Linux/ELOclient/ELOJavaclient.desktop" > $pkgdir/usr/share/applications/elo-23-lts.desktop
+}