implement foundation + room system (Plan 1 of 5)

Bun workspace monorepo with shared, server, client packages.
Server: Hono + @hono/node-ws, Drizzle + PostgreSQL, in-memory room manager
with WebSocket broadcasting, HTTP room creation, DB persistence layer.
Client: React 19 + Vite + Tailwind v4 + shadcn/ui, TanStack Router with
landing/display/host/player routes, Zustand store, WebSocket connection hook.
20 tests passing (room manager unit + WS integration).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/data/scoring.json

@@ -0,0 +1,12 @@
+{
+	"prediction_winner": 25,
+	"prediction_top3": 10,
+	"prediction_nul_points": 15,
+	"jury_max_per_round": 5,
+	"bingo_per_square": 2,
+	"bingo_full_bonus": 10,
+	"quiz_easy": 5,
+	"quiz_medium": 10,
+	"quiz_hard": 15,
+	"dish_correct": 5
+}