Add "today" button to all date pickers

[MichaelZhao21]

Is your feature request related to a problem? Please describe.

There's no way to get today's date on a date picker.

Describe the solution you'd like

Add today buttons to the date input components. This would be this component: https://github.com/MichaelZhao21/tams-club-cal/blob/master/client/src/components/edit/events/date-input.tsx and https://github.com/MichaelZhao21/tams-club-cal/blob/master/client/src/components/edit/events/date-time-input.tsx

Describe alternatives you've considered

However, we could also just add this functionality to the calendar/forms separately (though it would be nice to have this embedded within the date picker somehow)

Additional context

N/A