Add legacy RN close recovery flow

[ben-kaufman]

Summary

• Bumps bitkit-core to v0.1.63 for legacy RN native SegWit close-output recovery support.
• Adds a Dev Settings recovery flow with a configurable scan index limit, defaulting to 10,000.
• Scans for affected close outputs, shows the found amount/output count, prepares a sweep preview, and broadcasts only after explicit user confirmation.

Notes

• Recovery sweeps to the current wallet on-chain address using the app's current network and Electrum config.
• The flow is intentionally in Dev Settings so support can start it manually instead of auto-sending user funds.
• The UI reuses existing Bitkit settings/navigation/button/text input components to stay aligned with the app style.

Validation

• ./gradlew compileDevDebugKotlin
• ./gradlew detekt (passes; remaining printed findings are pre-existing import-order findings in unrelated files)
• ./gradlew testDevDebugUnitTest