Add Find Node buzzer action

[RCGV1]

What changed?

• Adds a Find Node action under Tools for connected nodes that advertise DeviceMetadata.hasBuzzer.
• Sends AdminMessage.find_node_request and handles find_node_response results for started, stopped, no buzzer, and buzzer disabled states.
• Updates generated Swift protobufs and the protobufs submodule to the Find Node protobuf contract.
• Polishes the action UI with a native SwiftUI card, active countdown, stop/restart controls, and reduced-motion support.
• Removes debug-only metadata refresh controls from the Find Node surface.
• Avoids a hidden timezone set_config write during connect sync and improves BLE reconnect behavior by waiting for poweredOn and retrieving cached peripherals.

Related PRs:

• Firmware: Add Find Node buzzer admin action firmware#10755
• Protobufs: Add Find Node buzzer admin protobufs protobufs#956

Why did it change?

Firmware now exposes a dedicated Find Node admin command so the phone can make the connected node buzz without overloading input events or ringtone paths. The app needs the matching generated protobufs, metadata capability gating, and response handling so users only see the action on supported nodes and get clear feedback when firmware declines it.

The connect-sync change avoids sending an unrelated full DeviceConfig write just because tzdef is empty, which can cause unnecessary firmware config reload behavior while the app is still syncing.

How is this tested?

• Built clean PR worktree with xcodebuild -workspace /tmp/Meshtastic-Apple-findnode-build/Meshtastic.xcworkspace -scheme Meshtastic -configuration Debug -destination 'platform=iOS Simulator,id=DE3343B3-1E9D-4C2D-9AFE-B50AC465BEBA' -derivedDataPath /tmp/Meshtastic-Apple-findnode-build/DerivedData CODE_SIGNING_ALLOWED=NO build.
• Result: BUILD SUCCEEDED.
• Swift protobufs regenerated from protobuf submodule commit 6566cd61812af44c5a3e77f01db8f72de0a1020a.

Known local build warnings were pre-existing/environmental: SwiftLint command not installed, duplicate compile-source warnings for existing files, and AppIntents metadata extraction skipped.

Screenshots/Videos (when applicable)

UI was manually iterated during local device testing; no final screenshot is attached in this PR body.

Checklist

• My code adheres to the project's coding and style guidelines.
• I have conducted a self-review of my code.
• I have commented my code, particularly in complex areas.
• I have verified whether these changes require updates to the in-app documentation under docs/user/ or docs/developer/, and updated accordingly (see copilot-instructions.md for the view → doc page mapping). If no doc update is needed, add the skip-docs-check label.
• I have tested the change to ensure that it works as intended.

[garthvh]

Can't merge until the protobufs are finalized