security: redact hidden retro combos from all public docs

Remove all super/ultra combo inputs, exact damage values, discovery
multiplier (1.5x), and Konami Code from BOT_SETUP.md, bot-guide.md,
docs.ts API, and example bot. Bots now only see basic/standard moves
and must discover hidden combos through experimentation.

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

server/src/routes/docs.ts

@@ -126,10 +126,10 @@ docsRouter.get('/webhook', (c) => {
           type: 'retro_mode',
           label: 'Retro Mode',
           timeout_ms: 12000,
-          description: 'Arcade combo round. Submit 3 gamepad combos separated by |. Use ↑↓←→ A B buttons. Longer combos = more damage. Secret combos exist — experiment!',
+          description: 'Arcade combo round. Submit 3 gamepad combos separated by |. Use ↑↓←→ A B buttons. Known moves are listed in the prompt. Secret combos exist — experiment with longer chains!',
           response_format: 'combo1 | combo2 | combo3',
-          example_response: '↓→↓→+A | →→+A | ↑↓+A',
-          note: 'One retro round per fight, randomly placed between rounds 3-8.',
+          example_response: '↓→+A | →→+A | ←+B',
+          note: 'One retro round per fight. Known moves vary each fight. Discovering hidden combos earns a damage bonus.',
         },
       ],
     },