Add BleCommandQueue to UniversalBlePeripheral

[fotiDim]

This PR adds command queuing support to peripheral mode.

[Copilot]

Pull request overview

Adds command-queuing support to UniversalBlePeripheral so peripheral-mode operations can be serialized globally, per-device, or run in parallel—mirroring the existing central-side UniversalBle queue behavior.

Changes:

• Wrap peripheral commands (addService, startAdvertising, updateCharacteristicValue, etc.) with BleCommandQueue and expose queueType, timeout, clearQueue, and onQueueUpdate.
• Add unit tests covering global vs per-device queuing and queue cancellation.
• Update iOS/macOS and Android peripheral plugins for case-insensitive deviceId lookups and add iOS/macOS handling for CoreBluetooth transmit-queue exhaustion.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/ble_peripheral_command_queue_test.dart	Adds tests validating peripheral command queue serialization, per-device isolation, and cancellation behavior.
README.md	Documents the new peripheral command queue configuration and usage patterns.
lib/src/universal_ble_peripheral.dart	Introduces BleCommandQueue integration and new queue configuration surface for peripheral APIs.
darwin/universal_ble/Sources/universal_ble/UniversalBlePeripheralPlugin.swift	Updates iOS/macOS peripheral notify path (including queue-full failure handling) and deviceId lookup behavior.
darwin/universal_ble/Sources/universal_ble/UniversalBlePeripheralExtensions.swift	Extends peripheral error type to support new failure mode.
CHANGELOG.md	Notes the new peripheral queue feature and iOS/macOS transmit queue handling.
android/src/main/kotlin/com/navideck/universal_ble/UniversalBlePeripheralPlugin.kt	Updates Android peripheral notify target selection with case-insensitive deviceId lookup.

Suppressed comments (2)

test/ble_peripheral_command_queue_test.dart:107

• This uses a fixed 10ms delay to wait for queued work, which can be timing-dependent and flaky. Prefer pumpEventQueue() to flush microtasks/event-queue deterministically before asserting on callLog.

      await Future<void>.delayed(const Duration(milliseconds: 10));

test/ble_peripheral_command_queue_test.dart:149

• This fixed-duration delay makes the test depend on wall-clock scheduling; on loaded environments it can race and fail. Use pumpEventQueue() to allow the queued command to start before calling clearQueue() and asserting cancellation.

      await Future<void>.delayed(const Duration(milliseconds: 10));

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