Add configurable stage move limits

[janmarsino98]

Fixes #973

Summary

• allow stage definitions to provide a default maxMoves
• keep explicit limits from setStage and setActivePlayers as higher-priority overrides
• support the deprecated moveLimit spelling for compatibility
• document stage-level limits and their precedence

Root cause

Stage configuration only exposed moves and the next stage. The flow initialized active-player limits exclusively from activation arguments, so it never consulted the stage being entered.

Tests

• focused core suites: 197 tests passed
• pnpm run lint
• pnpm test: 43 suites passed, 908 tests passed, 1 todo, 1 snapshot
• pnpm run test:coverage: 100% statements, branches and lines
• pnpm run ts
• pnpm run build

Checklist

• Use a separate branch in your local repo (not main).
• Test coverage is 100%.