feat: add 9 new games and update help/README

New commands: numguess/ng, wordchain/wc/endwc, acronym/ac,
20q/q/answer, nhie, hottake, ttt/move, blackjack/hit/stand,
triviaduel/da. All per-room with AI-generated content where
applicable. callbacks.py wired up for new reaction handlers
(acronym votes, nhie, hottake). Help and README updated with
full command reference.

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

matrixbot/callbacks.py

@@ -4,7 +4,16 @@ from functools import wraps
 from nio import AsyncClient
 
 from config import BOT_PREFIX, MATRIX_USER_ID
-from commands import COMMANDS, metrics, check_scramble_answer, check_riddle_answer, record_wyr_vote
+from commands import (
+    COMMANDS,
+    metrics,
+    check_scramble_answer,
+    check_riddle_answer,
+    record_wyr_vote,
+    record_acronym_vote,
+    record_nhie_reaction,
+    record_hottake_reaction,
+)
 from welcome import handle_welcome_reaction, handle_space_join, SPACE_ROOM_ID
 
 logger = logging.getLogger("matrixbot")
@@ -82,6 +91,9 @@ class Callbacks:
 
         await handle_welcome_reaction(self.client, room.room_id, event.sender, reacted_event_id, key)
         record_wyr_vote(reacted_event_id, event.sender, key)
+        record_acronym_vote(reacted_event_id, event.sender, key)
+        record_nhie_reaction(reacted_event_id, event.sender, key)
+        record_hottake_reaction(reacted_event_id, event.sender, key)
 
     async def unknown_event(self, room, event):
         """Fallback handler for UnknownEvent — catches any m.reaction not parsed by nio."""
@@ -103,6 +115,9 @@ class Callbacks:
 
         await handle_welcome_reaction(self.client, room.room_id, event.sender, reacted_event_id, key)
         record_wyr_vote(reacted_event_id, event.sender, key)
+        record_acronym_vote(reacted_event_id, event.sender, key)
+        record_nhie_reaction(reacted_event_id, event.sender, key)
+        record_hottake_reaction(reacted_event_id, event.sender, key)
 
     async def member(self, room, event):
         """Handle m.room.member events — watch for Space joins."""