Add Monte Carlo simulator, game metrics and sim CLI (Phase 5)

`dojo sim` plays seeded games over a scenario matrix (variant, players,
Kiai bonus, start position, bot lineup) in parallel, prints a summary per
scenario and optionally writes one CSV row per game. Metrics are replayed
from the event log. Plan updated with the Phase 5 baseline.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.md

@@ -32,6 +32,23 @@ uv run dojo board validate --quadrant other.txt --legend other.toml   # check an
 `validate` exits with `0` when the board is fine (warnings allowed), `1` on rule violations,
 `2` when the file is malformed or missing.
 
+## Simulation
+
+Plays many seeded games with bots and prints metrics per scenario. Every combination of the
+listed values is a scenario; game `i` of each scenario uses seed `--seed + i`, and the lineup
+rotates one seat per game. Bots: `random`, `balanced`, `farmer`, `aggressive`.
+
+```sh
+uv run dojo sim                                   # variants A and B, 4 players, 200 games each
+uv run dojo sim --games 1000 --csv games.csv      # more games; one CSV row per game
+uv run dojo sim --variant B --players 3 4 6 8 --start 0 3   # player counts x start position
+uv run dojo sim --kiai 2 1                        # Kiai +2 vs +1
+uv run dojo sim --lineup balanced,random balanced # several lineups (comma-separated seats)
+uv run dojo sim --seed 42 --jobs 1                # other dice; single process
+```
+
+Minutes are estimated as 45 s per turn plus 30 s per Kumite.
+
 ## Development
 
 ```sh