Feat: Enhance Video Recorder

[dhairyashiil]

As an EmbeddedChat developer

I need to: Enhance the video recorder

So That: Users can have a better and easier video recording experience with clearer controls.

Acceptance Criteria

• Make transitions smoother for starting, stopping, and sending the video, so users have a better flow when using the recorder.
• Update the interface with buttons for starting, stopping, and sending the video. The send button should be disabled until there’s a recording to send.
• Buttons that change color to fit the theme according to light and dark theme.