feat: add 7 new commands — hangman, scramble, wyr, riddle, roast, story, debate

- !hangman: AI picks a 5-8 letter word with hint; players !guess letters/words, 6 wrong = dead
- !scramble: AI picks a word, scrambles it; first correct answer in chat wins (45s timeout)
- !wyr: AI generates Would You Rather with 🅰️/🅱️ reaction voting, 30s reveal
- !riddle: AI generates riddle monitored for 60s, substring match in chat wins
- !roast: AI roasts a target using BALL_MODEL with special Jared/Wynter lore
- !story: collaborative story with !story add <line> and !story end (AI conclusion, max 10 lines)
- !debate: AI writes FOR/AGAINST arguments for any topic using ASK_MODEL
- callbacks.py: route all non-command messages through scramble/riddle answer checkers
- help: updated categories to include all new commands

matrixbot/callbacks.py

@@ -4,7 +4,7 @@ from functools import wraps
 from nio import AsyncClient
 
 from config import BOT_PREFIX, MATRIX_USER_ID
-from commands import COMMANDS, metrics
+from commands import COMMANDS, metrics, check_scramble_answer, check_riddle_answer
 from welcome import handle_welcome_reaction, handle_space_join, SPACE_ROOM_ID
 
 logger = logging.getLogger("matrixbot")
@@ -42,6 +42,13 @@ class Callbacks:
             return
 
         body = event.body.strip() if event.body else ""
+
+        # Check active non-command games that monitor all room messages
+        if body and not body.startswith(BOT_PREFIX):
+            await check_scramble_answer(self.client, room.room_id, event.sender, body)
+            await check_riddle_answer(self.client, room.room_id, event.sender, body)
+            return
+
         if not body.startswith(BOT_PREFIX):
             return