Support of realtime transcription, post-meeting transcription and summary added

New Features:

1. Real-Time Transcription which enables realtime transcription functionality with methods and events.
   • Methods added: startTranscription and stopTranscription to enable and disable transcription respectively.
   • Events: onTranscriptionStateChanged and onTranscriptionText.
2. Post-meeting Transcription and summary capabilities with recording andHLS methods.
   • startRecording(): Begins recording the meeting and supports post-transcription and summary configuration.
   • startHls(): Starts HLS streaming with options for post-transcription and summary settings.

Change Log:
1. Added new error codes.