feat(reactions): add message reactions API and web quick reactions

app/database/models.py

@@ -2,7 +2,7 @@ from app.auth.models import EmailVerificationToken, PasswordResetToken
 from app.chats.models import Chat, ChatMember
 from app.email.models import EmailLog
 from app.media.models import Attachment
-from app.messages.models import Message, MessageHidden, MessageIdempotencyKey, MessageReceipt
+from app.messages.models import Message, MessageHidden, MessageIdempotencyKey, MessageReaction, MessageReceipt
 from app.notifications.models import NotificationLog
 from app.users.models import User
 
@@ -14,6 +14,7 @@ __all__ = [
     "EmailVerificationToken",
     "Message",
     "MessageIdempotencyKey",
+    "MessageReaction",
     "MessageReceipt",
     "NotificationLog",
     "PasswordResetToken",