Update RSVP page to display all others going for the event

[probablyangg]

requirements

• Attendees able to View all others attending an event after marking yourself as going
• Organizer sees all RSVPs and an ability to copy all emails (an option to send an email directly will come later)

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todo

• the component is only visible if you are logged in
• Click on the component to open a modal
• Modal should display: all other rsvp names
• a close button
• If organizer clicks on the component, the modal displays all emails and a button to copy all emails (comma separated)