fix: Add participant_disconnect and unlink methods, to reconnect human input

[brightsparc]

Fixes: #1124

This adds new method to disconnect a participant and refactors the inner methods to be class level.

• May want to review diff without whitespace since I've moved some internal methods up a level
• The type checking required me to explicitly reference vad.VADEvent and stt.SpeechEvent

cc @theomonnom

[changeset-bot]

🦋 Changeset detected

Latest commit: f095989

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

This PR includes changesets to release 1 package

Name	Type
livekit-agents	Minor

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[brightsparc]

Thanks @theomonnom, could we get this merged so it makes it into the next release?

[theomonnom]

Hey @brightsparc, probably sometimes this week, we're thinking about reworking this flow a bit

[brightsparc]

@theomonnom I've updated this with changes from main so it's ready to land. Are there any more refactorings planned for this flow, or could we land this as is?

[brightsparc]

@theomonnom is there still plans to land this?