Release build squashed

.github/workflows/scripts/butler_push.sh

@@ -0,0 +1,28 @@
+#! /bin/bash
+
+butler_channel=""
+butler_exe=""
+release_dir=""
+if [ "$BUILD_OS" = "ubuntu" ]; then
+    butler_channel=linux-amd64
+    butler_exe=butler
+    release_dir="linux"
+elif [ "$BUILD_OS" = "windows" ]; then
+    butler_channel=windows-amd64
+    butler_exe=butler.exe
+    release_dir="windows"
+elif [ "$BUILD_OS" = "macos" ]; then
+    butler_channel=darwin-amd64
+    butler_exe=butler
+    release_dir="macos"
+fi
+
+# -L follows redirects
+# -O specifies output name
+curl -L -o butler.zip https://broth.itch.ovh/butler/${butler_channel}/LATEST/archive/default
+unzip butler.zip
+# GNU unzip tends to not set the executable bit even though it's set in the .zip
+chmod +x ${butler_exe}
+# just a sanity check run (and also helpful in case you're sharing CI logs)
+./${butler_exe} -V
+./${butler_exe} push "build/Blades of Exile/" nqn/blades-of-exile:${release_dir}