feat: extract text from PreviewFormBanner and mutation files into sep…#9266

brendancjz wants to merge 3 commits intoopengovsg:developopengovsg/FormSG:developfrom

brendancjz:feat/i18n-extract-text-form-banner-and-mutationsbrendancjz/FormSG:feat/i18n-extract-text-form-banner-and-mutationsCopy head branch name to clipboard