Add detailed design and implementation scaffolding for TiltedEvolution-style animation synchronization. New documentation: animation-architecture-alignment.md, animation-sync-analysis.md, f4-animation-descriptor.md, phase1-3-completion-report.md and updates to dev-log.md describing Phase 1-3 progress. Plugin: introduce F4AnimationDescriptor (plugin/include/F4AnimationDescriptor.h, plugin/src/F4AnimationDescriptor.cpp) and extend remote state handling (plugin/include/F4TRemotePlayerState.h). Integrate protocol/state extensions and refactor points: plugin/src/F4TNetworking.cpp now parses optional actorStateFlags and actionEvents; proxy controller and animation sync files (F4TProxyActorController.cpp, F4TProxyAnimationSync.cpp) updated to support descriptor-based bulk variable snapshots and actor state replication. Server/tools: update server/dev_server_app.py and server/fake_client.py to handle and display the new optional fields. These changes are additive and backward-compatible and set up phases for action capture, dynamic proxy spawn, and action-replay integration.
