Added severial examples. Corrected towards the correct return type and add utilities to prevent working with pointers

Raylib-cs/types/native/FilePathList.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Runtime.InteropServices;
 
 namespace Raylib_cs;

Raylib-cs/types/native/Utf8Buffer.cs

@@ -21,6 +21,11 @@ public readonly ref struct Utf8Buffer
         return (sbyte*)_data.ToPointer();
     }
 
+    public unsafe byte* AsBytePointer()
+    {
+        return (byte*)_data.ToPointer();
+    }
+
     public void Dispose()
     {
         Marshal.ZeroFreeCoTaskMemUTF8(_data);