Add N3DS to models

BurnOutSharp.Models/N3DS/ExeFSFileHeader.cs

@@ -0,0 +1,33 @@
+namespace BurnOutSharp.Models.N3DS
+{
+    /// <summary>
+    /// There are a maximum of 10 file headers in the ExeFS format. (This maximum
+    /// number of file headers is disputable, with makerom indicating a maximum of
+    /// 8 sections and makecia indicating a maximum of 10. From a non-SDK point of
+    /// view, the ExeFS header format can hold no more than 10 file headers within
+    /// the currently define size of 0x200 bytes.)
+    /// </summary>
+    /// <see href="https://www.3dbrew.org/wiki/ExeFS#File_headers"/>
+    public sealed class ExeFSFileHeader
+    {
+        /// <summary>
+        /// File name
+        /// </summary>
+        public string FileName;
+
+        /// <summary>
+        /// File offset
+        /// </summary>
+        public uint FileOffset;
+
+        /// <summary>
+        /// File size
+        /// </summary>
+        public uint FileSize;
+
+        /// <summary>
+        /// SHA256 hash calculated over the entire file contents
+        /// </summary>
+        public byte[] FileHash;
+    }
+}