chore(project): add action files

entrypoint.sh

@@ -0,0 +1,21 @@
+#!/bin/bash -l
+set -uxo pipefail
+
+CHANGELOG_OUT=${CHANGELOG_OUT:="git-cliff/CHANGELOG.md"}
+
+# Create the output directory
+mkdir -p "$(dirname $CHANGELOG_OUT)"
+
+# Execute git-cliff
+git-cliff "$@" > "$CHANGELOG_OUT"
+exit_code=$?
+changelog=$(cat "$CHANGELOG_OUT")
+
+# Output to console
+echo "$changelog"
+
+# Set output
+echo "::set-output name=changelog::$changelog"
+
+# Pass exit code to the next step
+echo ::set-output name=exit_code::$exit_code