Add changelog script to be externally callable (#626)

Author: jonathanKingston

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Collect commit ranges
         run: |
-          echo "CHANGELOG=$(git log main --since "$(git show -s --format=%ci $(git rev-list --tags --max-count=1))" --pretty='format:- %s')" >> $GITHUB_OUTPUT
+          echo "CHANGELOG=$(bash ./scripts/changelog.sh)" >> $GITHUB_OUTPUT
 
       - name: Create Release
         uses: softprops/action-gh-release@v1

scripts/changelog.sh

@@ -0,0 +1 @@
+git log main --since "$(git show -s --format=%ci $(git rev-list --tags --max-count=1))" --pretty='format:- %s'