Concurrency helpers for queued worker execution, bounded parallel work, asynchronous update coordination, semaphore scopes, and wait handles.

dotnet add package TCSystem.Thread

• FIFO worker thread with synchronous and Task-based queue APIs
• Worker lifecycle, idle events, cancellation token, and queue clearing
• Bounded multiple-task executor with wait and cancellation support
• Async update helper and disposable update scopes
• Synchronous and asynchronous SemaphoreSlim lock scopes
• Awaitable WaitHandle extension

Create the main abstractions through TCSystem.Thread.Factory rather than constructing implementation classes directly.

Repository-wide prerequisites, target frameworks, dependencies, build, test, coverage, and API-documentation instructions are maintained in the main README.