POC : add consumer webRTC stream into liveKit and not in player

[nums]

• Split logic in different objects
• Add Consume feature
• Create a demo page to be able to send and receive stream

[SangwonOh]

I've seen some nice new features and well-organized code.

However, the interface has changed so much that it's hard to merge it into the current version.

If the same features are implemented while maintaining the current interface, it might be possible to merge it.

Thank you for your contribution.

[nums]

Hello, ok, I that it's possible, I will check and update PR in this way