Add adventure plugin, holdem CFR fixes, and wordle plugin

Adventure: Complete v1 daily idle RPG with DM-driven gameplay, equipment
shop, treasure system, TwinBee NPC, streak/grudge/party mechanics,
flavor text, and scheduled morning/evening/midnight tickers.

Holdem CFR: Fix three critical training bugs (fold not forfeiting pot,
free calls after raises, training/runtime key mismatch). Add performance
optimizations (preflop lookup table, zero-alloc equity, integer keys,
raise cap, regret pruning). Enrich abstraction with 12 equity buckets,
board texture dimension, and 6-char action history. Replace validation
with proper multi-street simulation.

Also includes wordle plugin, holdem seed tooling, and schema additions.

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

internal/plugin/flip.go

@@ -72,6 +72,8 @@ func (p *FlipPlugin) handleGames(ctx MessageContext) error {
 			"**!hangman start** — Collaborative Hangman\n"+
 			"**!blackjack €amount** — Blackjack (1-4 players vs dealer)\n"+
 			"**!uno €amount** — UNO (solo or multiplayer, classic or No Mercy)\n"+
+			"**!holdem join** — Texas Hold'em poker (2-9 players)\n"+
+			"**!wordle <word>** — Daily cooperative Wordle\n"+
 			"**!trivia** — Trivia questions\n\n"+
 			"**Economy:**\n"+
 			"**!balance** — Check your euros\n"+