backend for queues & minor front tweaks

backend/app/views/queue/schemas.py

@@ -0,0 +1,27 @@
+from typing import Union
+from pydantic import BaseModel
+from uuid import UUID
+
+
+class ParticipantInfo(BaseModel):
+    total: int
+    remaining: int
+
+
+class Queue(BaseModel):
+    name: str
+    description: Union[str, None] = None
+
+
+class QueueInList(Queue):
+    participants: ParticipantInfo
+
+    class Config:
+        from_attributes = True
+
+
+class QueueInDb(Queue):
+    id: UUID
+
+    class Config:
+        from_attributes = True