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/ProgramChainTable.cs

@@ -0,0 +1,28 @@
+namespace SabreTools.Data.Models.DVD
+{
+    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    public sealed class ProgramChainTable
+    {
+        /// <summary>
+        /// Number of Program Chains
+        /// </summary>
+        public ushort NumberOfProgramChains { get; set; }
+
+        /// <summary>
+        /// Reserved
+        /// </summary>
+        public ushort Reserved { get; set; }
+
+        /// <summary>
+        /// End address (last byte of last PGC in this LU)
+        /// relative to VMGM_LU
+        /// </summary>
+        public uint EndAddress { get; set; }
+
+        /// <summary>
+        /// Program Chains
+        /// </summary>
+        /// <remarks>NumberOfProgramChains entries</remarks>
+        public ProgramChainTableEntry[] Entries { get; set; } = [];
+    }
+}