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_routes_me.py

@@ -10,8 +10,8 @@ from unittest import mock
 from httpx import ASGITransport, AsyncClient
 from pwo import async_test
 
-from scopa.app import app
-from scopa.config import settings
+from tavolo.app import app
+from tavolo.config import settings
 from tests.helpers import oidc_user
 
 
@@ -45,7 +45,7 @@ class StaticRouteTest(unittest.TestCase):
             (cards / "07D.svg").write_text("<svg/>")
 
             patched = dataclasses.replace(settings, static_dir=dist)
-            with mock.patch("scopa.routes.static.settings", patched):
+            with mock.patch("tavolo.routes.static.settings", patched):
                 transport = ASGITransport(app=app)
                 async with AsyncClient(transport=transport, base_url="http://127.0.0.1") as client:
                     index = await client.get("/")
@@ -74,7 +74,7 @@ class StaticRouteTest(unittest.TestCase):
     @async_test
     async def test_missing_dist_returns_404(self) -> None:
         patched = dataclasses.replace(settings, static_dir="/nonexistent-dist")
-        with mock.patch("scopa.routes.static.settings", patched):
+        with mock.patch("tavolo.routes.static.settings", patched):
             transport = ASGITransport(app=app)
             async with AsyncClient(transport=transport, base_url="http://127.0.0.1") as client:
                 response = await client.get("/")