feat: enhance chat functionality with global notifications and user management

- Implemented global notifications for new messages, allowing users to receive alerts even when the chat is minimized or closed.
- Added functionality for users to leave group conversations and meeting rooms, with appropriate notifications sent to remaining participants.
- Introduced a modal for sending notifications within meeting rooms, enabling admins to communicate important messages to all participants.
- Enhanced the chat components to support mention functionality, allowing users to tag participants in messages for better engagement.
- Updated backend mutations to handle user exit from conversations and sending notifications, ensuring robust data handling and user experience.

apps/web/src/lib/components/chat/SalaReuniaoManager.svelte

@@ -151,7 +151,11 @@
   }
 </script>
 
-<div class="fixed inset-0 z-[100] flex items-center justify-center bg-black/50" onclick={onClose}>
+<div class="fixed inset-0 z-[100] flex items-center justify-center bg-black/50" onclick={(e) => {
+  if (e.target === e.currentTarget) {
+    onClose();
+  }
+}}>
   <div
     class="bg-base-100 rounded-xl shadow-2xl w-full max-w-2xl max-h-[80vh] flex flex-col m-4"
     onclick={(e) => e.stopPropagation()}