Remove auto-accept from pairing

[tembo[bot]]

Summary

• Removed auto_accept field from PairGenerateInput and PairGenerateAction in Rust core.
• Updated CLI PairCmd::Generate to no longer include auto_accept.
• Removed autoAccept state, mutation parameter, props, and UI toggle from PairingPanel.tsx (React Native) and PairingModal.tsx (Web/Tauri).
• Removed autoAccept parameter from startPairingAsInitiator in PairingExtensions.swift.
• Updated PairGenerateInput type in types.ts to an empty object.

Closes #152dd1b5-628e-4685-83d7-553d48b1a23b

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