Generate sha256 checksums for each release

Closes #442

Author: BtbN

.github/workflows/build.yml

@@ -282,7 +282,8 @@ jobs:
           RELDATE="$(date +'%Y-%m-%d %H:%M')"
           NAME="Auto-Build $RELDATE"
           TAGNAME="autobuild-$(date +'%Y-%m-%d-%H-%M')"
-          gh release create "$TAGNAME" --target "master" --title "$NAME" artifacts/*.{zip,tar.xz}
+          (cd artifacts && sha256sum *.{zip,tar.xz} > checksums.sha256)
+          gh release create "$TAGNAME" --target "master" --title "$NAME" artifacts/*.{zip,tar.xz} artifacts/checksums.*
           echo "tag_name=${TAGNAME}" >> $GITHUB_OUTPUT
           echo "rel_date=${RELDATE}" >> $GITHUB_OUTPUT
         env:
@@ -293,6 +294,7 @@ jobs:
           shopt -s nullglob
           mkdir latest_artifacts
           ./util/repack_latest.sh latest_artifacts artifacts/*.{zip,tar.xz}
+          (cd latest_artifacts && sha256sum *.{zip,tar.xz} > checksums.sha256)
           NAME="Latest Auto-Build (${{ steps.create_release.outputs.rel_date }})"
           TAGNAME="latest"
           gh release delete --cleanup-tag --yes "$TAGNAME" || true