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/webpush_api.py

@@ -24,10 +24,10 @@ from ..crud import (
     get_webpush_subscription,
 )
 
-webpush_router = APIRouter(prefix="/api/v1/webpush", tags=["webpush"])
+webpush_router = APIRouter(prefix="/api/v1/webpush", tags=["Webpush"])
 
 
-@webpush_router.post("/", status_code=HTTPStatus.CREATED)
+@webpush_router.post("", status_code=HTTPStatus.CREATED)
 async def api_create_webpush_subscription(
     request: Request,
     data: CreateWebPushSubscription,
@@ -49,7 +49,7 @@ async def api_create_webpush_subscription(
         )
 
 
-@webpush_router.delete("/", status_code=HTTPStatus.OK)
+@webpush_router.delete("", status_code=HTTPStatus.OK)
 async def api_delete_webpush_subscription(
     request: Request,
     wallet: WalletTypeInfo = Depends(require_admin_key),