Implement basic unit test infrastructure with abstraction patterns

Co-authored-by: ngenovese11 <23391587+ngenovese11@users.noreply.github.com>

tests/PepperDash.Essentials.Core.Tests/Abstractions/IThreadService.cs

@@ -0,0 +1,37 @@
+using System;
+
+namespace PepperDash.Essentials.Core.Tests.Abstractions
+{
+    /// <summary>
+    /// Abstraction for thread operations to enable testing
+    /// </summary>
+    public interface IThreadService
+    {
+        /// <summary>
+        /// Sleeps the current thread for the specified milliseconds
+        /// </summary>
+        /// <param name="milliseconds">Time to sleep in milliseconds</param>
+        void Sleep(int milliseconds);
+        
+        /// <summary>
+        /// Creates and starts a new thread
+        /// </summary>
+        /// <param name="threadFunction">The function to execute in the thread</param>
+        /// <param name="parameter">Parameter to pass to the thread function</param>
+        /// <returns>Thread identifier or handle</returns>
+        object CreateAndStartThread(Func<object, object> threadFunction, object parameter);
+        
+        /// <summary>
+        /// Aborts the specified thread
+        /// </summary>
+        /// <param name="thread">The thread to abort</param>
+        void AbortThread(object thread);
+        
+        /// <summary>
+        /// Checks if the thread is currently running
+        /// </summary>
+        /// <param name="thread">The thread to check</param>
+        /// <returns>True if the thread is running, false otherwise</returns>
+        bool IsThreadRunning(object thread);
+    }
+}