Sync leviathans gameplay

[tornac1234]

Creature sync:

• Sync Reaper Leviathans
• Sync Sea Dragons
• Sync Sea Treaders

Creature behaviours:

• Sync leviathans attacking cyclops
• Sync leviathans attacking a player or vehicle (seamoth or exosuit)

Weapon sync:

• Sync statis rifle
• Sync torpedos (better than current implementation)

Other related issues:

• Fix player vitals not showing a creative player's name
• Fix seamoth not spawning module inventory
• Adds an InfectedMixin and a LiveMixin on remote players to ensure they're potential targets

TODO when everything is done:
- [ ] Ensure crash fishes can target other players POSTPONED to another PR (will be short but required both this one and #2101 )

[tornac1234]

Would require some tests :)

[tornac1234]

There's still the following to be looked into (but most of the code is ready for review):

• sometimes, move animation are chunky and you can see a small jump (FIXED)
• when another player gets eaten by a leviathan, they broadcast the related cinematic which is played on other players so a black screen appears as if they got eaten themselves by a leviathan (but they didn't)

[tornac1234]

The latest Sea Dragons sync code wasn't tested because it's really hard without #2113

[Measurity]

Looks good CW but I need to do in-game testing.

[dartasen]

Did a playtest with Ninja & Tornac :

• Seems to work well
• Waiting on a commit to remove debug messages for actions
• (Optional) Waiting on a commit for cyclops beacon death sync