migrate-components.sh

$ git status
On branch ts-setup

$ git checkout -b migrate-components # checkout from ts-setup
$ mv components/Button.jsx components/Button.tsx
$ git add . && git commit -m 'Migrate button to TS'
$ git push -u origin migrate-components

migrate-firebase.sh

$ git checkout migrate-to-firebase
$ git reset --soft develop
$ git restore --staged .

setup-firebase.sh

$ git branch -M setup-firebase

ts-setup.sh

$ git status # we are on master
On branch master

$ git checkout -b ts-setup # checkout from master
$ npm i -D typescript && npx tsc --init
$ git add . && git commit -m 'Setup TypeScript'
$ git push -u origin ts-setup