First round of cleanup for DolphinLib additions

SabreTools.Data.Models/NintendoDisc/WiiPartitionGroup.cs

@@ -0,0 +1,23 @@
+namespace SabreTools.Data.Models.NintendoDisc
+{
+    public class WiiPartitionGroup
+    {
+        /// <summary>
+        /// Number of entries in the group
+        /// </summary>
+        /// <remarks>Big-endian</remarks>
+        public uint Count { get; set; }
+
+        /// <summary>
+        /// Offset to the start of the table
+        /// </summary>
+        /// <remarks>Big-endian, requires left bit shift of 2 to get the real value</remarks>
+        public uint Offset { get; set; }
+
+        /// <summary>
+        /// Entries for the group, stored at <see cref="Offset"/>
+        /// </summary>
+        /// <remarks>Number of entries determined by <see cref="Count"/></remarks>
+        public WiiPartitionTableEntry[] Entries { get; set; } = [];
+    }
+}