ci: re-add docs workflow (#39)

.github/workflows/create-pr.sh

@@ -0,0 +1,36 @@
+# Adapted from https://github.com/paygoc6/action-pull-request-another-repo
+
+CLONE_DIR=$(mktemp -d)
+
+echo "Setting git variables"
+export GITHUB_TOKEN=$API_TOKEN_GITHUB
+git config --global user.email "$USER_EMAIL"
+git config --global user.name "$USER_NAME"
+
+echo "Cloning destination git repository"
+git clone "https://$API_TOKEN_GITHUB@github.com/$DESTINATION_REPO.git" "$CLONE_DIR"
+cd "$CLONE_DIR"
+git checkout "$DESTINATION_BASE_BRANCH"
+git pull origin "$DESTINATION_BASE_BRANCH"
+git checkout -b "$DESTINATION_HEAD_BRANCH"
+
+echo "Copying contents to git repo"
+mkdir -p "$CLONE_DIR/$DESTINATION_FOLDER"
+cp -r "$SOURCE_FOLDER/." "$CLONE_DIR/$DESTINATION_FOLDER/"
+
+echo "Adding files"
+git add .
+if git status | grep -q "Changes to be committed"
+then
+  echo "Adding git commit"
+  git commit -m "$COMMIT_MESSAGE"
+  echo "Pushing git commit"
+  git push -u origin "$DESTINATION_HEAD_BRANCH"
+  echo "Creating a pull request"
+  gh pr create -t "$PR_TITLE" \
+               -B "$DESTINATION_BASE_BRANCH" \
+               -b "" \
+               -H "$DESTINATION_HEAD_BRANCH"
+else
+  echo "No changes detected"
+fi