🌐 Add labels to selectors and rename meetup event route for clarity

- Added `label` attributes to timezone and country choosers for improved accessibility.
- Renamed `meetups.landingpage-event` route to `meetups.landingpage-event-old` for clarity and potential deprecation.
- Removed redundant `heading` attribute from sidebar's navlist group for cleaner rendering.

resources/views/components/layouts/app/sidebar.blade.php

@@ -82,7 +82,7 @@
     </flux:navlist>
 
     <flux:navlist variant="outline">
-        <flux:navlist.group :heading="__('Land')">
+        <flux:navlist.group>
             <div class="grid gap-4">
                 <div>
                     <livewire:country.chooser/>