Preserve raylib types

Removed "Cricle" and "Line" structs (and their extension methods) to conserve only raylib types.

Added "Dimensions" property to "Texture2D"
Added another "Load" overload for the "Texture2D" extensions (load from memory)

New overloads for the "LoadFileData" and "SaveFileData" methods

Raylib-cs/types/Texture2D.cs

@@ -1,4 +1,5 @@
 using System.Runtime.InteropServices;
+using System.Numerics;
 
 namespace Raylib_cs;
 
@@ -128,4 +129,15 @@ public partial struct Texture2D
     /// Data format (PixelFormat type)
     /// </summary>
     public PixelFormat Format;
+
+    /// <summary>
+    /// Get width and height packed in a Vector2
+    /// </summary>
+    public Vector2 Dimensions
+    {
+        get
+        {
+            return new Vector2(Width, Height);
+        }
+    }
 }