Libraries

This change looks dramatic, but it's just separating out the already-split namespaces into separate top-level folders. In theory, every single one could be built into their own Nuget package. `SabreTools.Serialization` still builds the normal Nuget package that is used by all other projects and includes all namespaces.

SabreTools.Data.Models/DVD/ParentalManagementMasksTableEntry.cs

@@ -0,0 +1,24 @@
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Data.Models.DVD
+{
+    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
+    public sealed class ParentalManagementMasksTableEntry
+    {
+        /// <summary>
+        /// Country code
+        /// </summary>
+        public ushort CountryCode;
+
+        /// <summary>
+        /// Reserved
+        /// </summary>
+        public ushort Reserved;
+
+        /// <summary>
+        /// Offset to PTL_MAIT
+        /// </summary>
+        public uint Offset;
+    }
+}