📜 Archivist: Update README controls to reflect current mechanics

[ScottMorris]

💡 What: Updated the How to Play section in README.md to match the current in-game controls. Specifically, added the ? hotkey, clarified the S squeak behaviour, and added the mobile swipe-down action.
🎯 Why: To ensure the documentation is accurate and helpful for players.
🔎 Where to read: README.md "How to Play" section.

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PR created automatically by Jules for task 6502310347267320265 started by @ScottMorris

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