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/BSP/TexdataStringTable.cs

@@ -0,0 +1,15 @@
+namespace SabreTools.Data.Models.BSP
+{
+    /// <summary>
+    /// The TexdataStringTable (Lump 44) is an array of integers which
+    /// are offsets into the TexdataStringData (lump 43).
+    /// </summary>
+    /// <see href="https://developer.valvesoftware.com/wiki/BSP_(Source)"/>
+    public sealed class TexdataStringTable : Lump
+    {
+        /// <summary>
+        /// Offsets
+        /// </summary>
+        public int[] Offsets { get; set; } = [];
+    }
+}