merge item multi-thread to CBT#61
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Refactors event, entity, and physics management to use thread-safe and lock-free data structures (Immutable collections, ConcurrentQueue, ConcurrentDictionary, Channel) for improved concurrency and performance. Replaces O(n) queue lookups with O(1) set/dictionary checks, ensures atomic updates for shared state, and optimizes queue draining and deferred action processing. Updates related code to use new APIs and patterns, and adds documentation for thread safety and workflow.
Replaced instance fields with ThreadLocal collections in Hull.GetConnectedHulls and Level.GetCells to ensure thread safety during parallel updates. Methods now return copies of the collections to prevent concurrent modification issues.
Changed ResetReceivedEvents from partial to regular method in EntitySpawner to ensure proper event queue clearing. Updated Level.cs to clear tempCellsLocal instead of tempCells, addressing potential issues with thread-local storage.
Implemented custom Lua converters for various thread-safe lists, ImmutableList, ImmutableHashSet, and ImmutableDictionary types. This allows seamless conversion between C# collections and Lua tables, improving Lua scripting integration with these collection types.
Replaced direct access to GameMain.Server.ConnectedClients with array snapshots in multiple server-side classes to prevent concurrent modification issues during parallel updates. Also updated PhysicsBody and LevelTrigger to avoid static/shared state in parallel contexts, improving thread safety and reliability.
Added an null check in AIObjectiveManager.cs to avoid accessing removed resources Use shuffledGaps instead of gapList to ensure update order requirement(already in master) Updated parallelism count
Fixed ContactManager potential dead-lock issue Use signal in DynamicTree so only one operation can be performed on the tree
Fixed crashes caused by gaps
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