Fix WebAudio stop error on early audio-button end

[stephenmjerge]

Summary

Fix InvalidStateError in audio-button-response when a response ends the trial while audio is still playing and trial_ends_after_audio is true. Remove ended listeners before calling stop() so the stop()-triggered ended event doesn’t re-enter end_trial on a fresh, not-started source node.

Reproduction

• response_ends_trial: true (default)
• response_allowed_while_playing: true (default)
• trial_ends_after_audio: true
• Click a button while the audio is still playing → console shows: Failed to execute 'stop' on 'AudioScheduledSourceNode': cannot call stop without calling start first.

Testing

• npm test (Node 18)

Fixes #3553

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Latest commit: 8a6b8fb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@jspsych/plugin-audio-button-response	Patch

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