chore: add script to rebase solutions

.scripts/rebase_solutions.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+# FOR PROJECT MAINTAINERS ONLY
+
+set -e
+# Update branches
+git checkout start-branch 
+git pull
+git checkout solutions
+# Rebase on solutions on start-branch
+git rebase start-branch
+
+# Check number of commits
+tags=("step2" "step3" "step4" "helpers" "step5" "step6" "step7" "step8" "step9" "step10" "step11" "_solution_")
+number_of_commits=$(git log --oneline solutions ^start-branch | wc -l)
+if [ "$commit_diff" -ne ${#tags[@]} ]; then
+    echo "The number of commits between start-branch and solutions is not correct, please update the branches or the script"
+    exit 2
+fi
+
+# Check tests pass
+CI=true yarn test || exit 3
+
+# Rebase interactively to re-apply tags 
+GIT_SEQUENCE_EDITOR="sed -i 's/^pick/edit/g'" git rebase -i start-branch
+
+# Apply tags to commits
+for tag in "${tags[@]}"
+do
+    echo "Tagging $tag"
+    git tag -f $tag
+    git rebase --continue
+done
+
+echo ""
+echo "================================================================="
+echo "Rebase done, please push changes:                                "
+echo "git push --force-with-lease && git push --force-with-lease --tags"
+echo "You may allow force push on the repo settings                    "
+echo "================================================================="