add timestamp to avatar.setVelocity for remote player

[codenametiger]

Based on commit https://github.com/webaverse/app/commit/519fc88e2b3f1a3b4f029099d6b4bd4367ee8af5 Need to add timestamp for setting velocity of avatar of remote player, else it is throwing undefined errors

Describe your changes

add timestamp to avatar.setVelocity for remote player, on remote players this is called from the RemotePlayer -> observePlayerFn where the timestamp is not added as the first parameter

What are the steps for a QA tester to test this pull request?

Run a multiplayer session and check for position update on remote player.

Issue ticket number and link

changes based on commit https://github.com/webaverse/app/commit/519fc88e2b3f1a3b4f029099d6b4bd4367ee8af5

Screenshots and/or video

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I am not adding any irrelevant code or assets
• [x] I am only including the changes needed to implement the change
• [x] I have playtested and intentionally tried to find error cases but couldn't
• [ ] I have completed the entire QA checklist on my PR