fix: use cheaper async mutex in place of 1-queue

[Nerivec]

Should be much cheaper/faster to run than Queue(1), no job object creation, no filtering needed, simple shift op.

@Koenkk what do you think?

[Copilot]

Pull request overview

This PR replaces the Queue(1) implementation with a new, lighter AsyncMutex class for mutual exclusion of asynchronous operations. The new implementation avoids the overhead of job object creation and filtering operations present in the original Queue class, using a simpler promise-based approach with a queue of resolver functions.

Key changes:

• Introduces a new AsyncMutex class that provides mutual exclusion for async operations using a locked flag and a queue of promise resolvers
• Updates six adapter implementations (zigate, zboss uart, zboss driver, z-stack, ezsp uart, ezsp driver, ember) to use AsyncMutex instead of Queue(1)
• Adds comprehensive test coverage for the new AsyncMutex class

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/utils/async-mutex.ts	New lightweight async mutex implementation using private fields and promise-based queuing
test/utils.test.ts	Adds test coverage for AsyncMutex with fake timers to verify mutex behavior and queue clearing
src/adapter/zigate/driver/zigate.ts	Replaces Queue(1) with AsyncMutex, updates execute() calls to run()
src/adapter/zboss/uart.ts	Replaces Queue(1) with AsyncMutex, updates execute() calls to run()
src/adapter/zboss/driver.ts	Replaces Queue() with AsyncMutex, updates execute() calls to run()
src/adapter/z-stack/znp/znp.ts	Replaces Queue() with AsyncMutex, updates execute() calls to run()
src/adapter/ezsp/driver/uart.ts	Replaces Queue(1) with AsyncMutex, updates execute() calls to run()
src/adapter/ezsp/driver/ezsp.ts	Replaces Queue() with AsyncMutex, updates execute() calls to run()
src/adapter/ember/ezsp/ezsp.ts	Replaces Queue(1) with AsyncMutex, updates execute() calls to run()

[Koenkk]

Looks good! Feel free to merge

[Nerivec]

Did you do a run with zstack just in case? (I already did with ember.)

[Koenkk]

yes, looks good!