Update merge docs with new requirements

[tudddorrr]

No description provided.

[claude]

The PR is a clear improvement — expanding from a single vague limitation to three specific, actionable cases in a scannable bullet format. Good use of inline code references that match the surrounding documentation.

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📖 Clarity & Readability

No issues found. The bullet ordering is logical (Player 2 constraint → Player 1 identification requirement → overlapping alias constraint), and each bullet is self-contained and unambiguous.

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✅ Accuracy & Completeness

No issues found. Code references are consistent with the surrounding documentation (Talo.current_alias / Talo.players.identify() in Godot; Talo.CurrentAlias / Talo.Players.Identify() in Unity).

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🎯 Structure, 💻 Code Examples, ⚡ Developer Experience, 🔗 Links & References

No issues found.