Move solution and projects to src

src/ARMeilleure/State/ICounter.cs

@@ -0,0 +1,18 @@
+namespace ARMeilleure.State
+{
+    /// <summary>
+    /// CPU Counter interface.
+    /// </summary>
+    public interface ICounter
+    {
+        /// <summary>
+        /// Counter frequency in Hertz.
+        /// </summary>
+        ulong Frequency { get; }
+
+        /// <summary>
+        /// Current counter value.
+        /// </summary>
+        ulong Counter { get; }
+    }
+}