#26 Feature/audio recording.... Done with the features of audio recording

[dikshantbhangala]

#26 Feature Addition: Added functionality to record audio messages within the message.dart file for better communication.

• Users can now record and send audio messages directly from the message panel.
• Integrated the FlutterSoundRecorder to handle audio recording.
• Implemented logic to toggle between start/stop recording states.
• Audio files are saved in .m4a format and are sent as part of the message data.

UI Changes:

• Added a mic icon button to the message input field for starting/stopping audio recording.
• Enhanced the input field to accommodate both text and audio message functionalities.

File Handling:

• Upon completion of recording, the file is sent with the appropriate message type (audio).
• File details, including name and path, are encoded and sent along with the audio message.

Other Changes:

• Cleaned up the message.dart file to ensure smooth integration of audio functionality.
• No changes were made to any other unrelated features or UI components

[dikshantbhangala]

@bhavik-mangla plz checkout with the pull request!!!!1