feat: improve on api structure, add openapi tags (#2295)

this logically groups api endpoints and gioves them specific openapi tags. which makes them nice on the `/docs` endpoint and makes the `api.py` more approachable
* add wallets list endpoint
* remove trailing slashes from endpoints
* fixup topup url
* fix trailing slash on auth
* backwards compatibility

lnbits/core/views/websocket_api.py

@@ -0,0 +1,40 @@
+from fastapi import (
+    APIRouter,
+    WebSocket,
+    WebSocketDisconnect,
+)
+
+from ..services import (
+    websocketManager,
+    websocketUpdater,
+)
+
+websocket_router = APIRouter(prefix="/api/v1/ws", tags=["Websocket"])
+
+
+@websocket_router.websocket("/{item_id}")
+async def websocket_connect(websocket: WebSocket, item_id: str):
+    await websocketManager.connect(websocket, item_id)
+    try:
+        while True:
+            await websocket.receive_text()
+    except WebSocketDisconnect:
+        websocketManager.disconnect(websocket)
+
+
+@websocket_router.post("/{item_id}")
+async def websocket_update_post(item_id: str, data: str):
+    try:
+        await websocketUpdater(item_id, data)
+        return {"sent": True, "data": data}
+    except Exception:
+        return {"sent": False, "data": data}
+
+
+@websocket_router.get("/{item_id}/{data}")
+async def websocket_update_get(item_id: str, data: str):
+    try:
+        await websocketUpdater(item_id, data)
+        return {"sent": True, "data": data}
+    except Exception:
+        return {"sent": False, "data": data}