added docs

README.md

@@ -2,6 +2,8 @@
 
 An online version of the card game Wizard (rules: `wizard_instructions/`).
 
+**Detailed documentation of the whole codebase: [`docs/`](docs/README.md).**
+
 | Component | Path | Tech |
 |-----------|------|------|
 | Frontend | `wizard_website/` | React + TypeScript + Vite, CSS modules, served by nginx |
@@ -18,7 +20,8 @@ browser ──wss /wizard/api/ws──────▶ Caddy ──/ws──▶ w
 
 1. A player opens the website, enters a name and creates a lobby (and joins it).
 2. The lobby shows a code (and an invite link, `?lobby=CODE`) others use to join.
-3. The host can add AI players, toggle the *not equal* / *hidden bids* rules, and start the game (3–6 players).
+3. The host can add AI players, toggle the *hidden bids* option, and start the game (3–6 players).
+   The sum of all bids may never equal the number of cards in hand (always on).
 4. The server runs the game with `wizard_game` and sends every player a personal view
    (`Observation`) after each move. Reloading the page reconnects to the same seat.
    A player who leaves a running game is replaced by an AI player.