Fixed sliding NPCs by adding a replay cache for animations

[miredirex]

Having a single LatestAction wasn't enough to bring Actors into a correct animation state. Now non-cell-owners (aka party members) will replay recently run animations when an Actor is spawned in their world

To discuss

• Not sure if the addition of AnimationEventLists is even acceptable as it will be difficult to maintain the lists. Is there a better way? Comparing actions using ends_with or starts_with doesn't feel right either
• Yeah I went the hardcoded route. What other approaches can we try? Serializing and sending animation graphs seems infeasible
• Should the server manage all this animation logic? What could be delegated to clients?

TODOs

• [ ] More testing: test with 3-4 players, test dead NPCs, test dragons, test draugrs stuck in sleeping positions
• [ ] GetSitState, IsSwimming, GetSleepState checks and state enforcing
• [ ] Sometimes moveStart is completely missing when it shouldn't
• [ ] Substitute normal animations for Instant counterparts when possible
• [ ] Double pass of weapon drawing sometimes cancels the latest queued animation
• [ ] Clear replay cache when a cell has no owner/when an NPC loses its owner?
• [ ] Extend F3 entity info for easier debugging
• [ ] Reorganize code a bit: ReplayCache class/struct
• [ ] Crashes found during testing: 1401909EC → 1402C3957, 14067644e → 140654fa4 → 1402b789a, 14067644e → 14064ff77 → 1402b789a. Might not be related to this fix at all, I don't know. Most often occurred during reconnects on the follower's side with lots of NPCs around