closes #21 feat: add calendar stream URL to meetups

This commit adds a calendar stream URL to each meetup. The URL is copied to
the clipboard when the user clicks on a new button added to the UI. The copied
URL can be pasted into a compatible calendar app, allowing the user to easily
add the meetup to their calendar. This feature was added to several views
including 'profile/meetups', 'meetup/landing-page', and
'meetup/landing-page-event'. The associated controller 'DownloadMeetupCalendar'
and livewire components were also updated accordingly.

app/Http/Controllers/DownloadMeetupCalendar.php

@@ -19,7 +19,7 @@ class DownloadMeetupCalendar extends Controller
         if ($request->has('meetup')) {
             $meetup = Meetup::query()
                             ->with([
-                                'meetupEvents',
+                                'meetupEvents.meetup',
                             ])
                             ->findOrFail($request->input('meetup'));
             $events = $meetup->meetupEvents;