feat: add first and last names to the user profile
feat: enable IPv6 environments by configuring a dual-stack listen in nginx
feat: add new currency
feat: add button to auto fill the next payment date
fix: vulnerability on test webhook endpoint
feat: use mobile style toggles instead of checkboxes
fix: barely readable placeholder text on textarea on dark the
feat: webhooks can now be used for cancelation notifications
refactor: run linter and cleanup php files
fix: not every payment cycle was shown on the calendar
feat: also show previous payments on the calendar for the current month
