Added a hook useBotSpeakingState to get the state of bot speaking event

[VanessaAntao]

Changelog Entry

Added a hook "useBotSpeakingState" to get the state of bot speaking event, in PR #5429, by @VanessaAntao

Description

• Added hook useBotSpeakingState.
• This hook will provide the current state of bot speaking.

Note

• There is no distinction in TTS for synthesis vs audio output, so BotSpeakingState is set to 'SPEAKING' when synthesis starts , i.e. even before audio output begins.

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

[VanessaAntao]

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