Added new RHI abstraction layer;

Added new console debug page to UnitTest;

Ghost.UnitTest/Models/LogItem.cs

@@ -0,0 +1,42 @@
+using System;
+
+namespace Ghost.UnitTest.Models;
+
+public enum LogLevel
+{
+    Info,
+    Warning,
+    Error,
+    Debug
+}
+
+internal struct LogItem
+{
+    public LogLevel Level { get; init; }
+    public string Message { get; init; }
+    public DateTime Timestamp { get; init; }
+    public string? StackTrace { get; init; }
+
+    public LogItem(LogLevel level, string message, string? stackTrace = null)
+    {
+        Level = level;
+        Message = message;
+        StackTrace = stackTrace;
+        Timestamp = DateTime.Now;
+    }
+
+    public override readonly string ToString()
+    {
+        return $"{Timestamp:HH:mm:ss.fff} [{Level}] {Message}";
+    }
+
+    public readonly string ToStringWithStackTrace()
+    {
+        if (string.IsNullOrEmpty(StackTrace))
+        {
+            return ToString();
+        }
+
+        return $"{ToString()}\n{StackTrace}";
+    }
+}