Rename the app from scopa to tavolo

The platform now hosts multiple card games, with scopone scientifico as
the first one. Rename the brand wherever it is not a game rule:

- move the Python package to server/src/tavolo and update imports
- rename the Postgres database/user, OIDC issuer path, client id and
  Redis key prefixes to tavolo (clean break: existing pgdata volumes and
  live games are not migrated)
- rename the Cargo package to tavolo-web and set the page title to Tavolo
- update docs and the Docker image path to woggioni/tavolo

The scopa game term (clearing the table) in the engine, state and web UI
is intentionally left untouched.

server/tests/test_stats.py

@@ -8,11 +8,11 @@ from datetime import datetime, timezone
 from httpx import ASGITransport, AsyncClient
 from pwo import async_test
 
-from scopa.app import app, tortoise_mixin
-from scopa.game import engine
-from scopa.game.state import GameState
-from scopa.models import Match, MatchPlayer
-from scopa.stats import save_match_result
+from tavolo.app import app, tortoise_mixin
+from tavolo.game import engine
+from tavolo.game.state import GameState
+from tavolo.models import Match, MatchPlayer
+from tavolo.stats import save_match_result
 from tests.helpers import oidc_user
 
 
@@ -37,7 +37,7 @@ def _finished_state() -> GameState:
         turn=0,
         table=[engine.parse_card("02C")],
     )
-    from scopa.game.state import PlayerState, Card
+    from tavolo.game.state import PlayerState, Card
 
     state.players = [
         PlayerState(sub="alice", name="alice", seat=0, hand=[Card.parse("02D")]),