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/PKZIP/StrongEncryptionHeader.cs

@@ -0,0 +1,44 @@
+namespace SabreTools.Data.Models.PKZIP
+{
+    /// <summary>
+    /// See the section describing the Strong Encryption Specification
+    /// for details.  Refer to the section in this document entitled
+    /// "Incorporating PKWARE Proprietary Technology into Your Product"
+    /// for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0017</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/>
+    public class StrongEncryptionHeader : ExtensibleDataField
+    {
+        /// <summary>
+        /// Format definition for this record
+        /// </summary>
+        public ushort Format { get; set; }
+
+        /// <summary>
+        /// Encryption algorithm identifier
+        /// </summary>
+        public ushort AlgID { get; set; }
+
+        /// <summary>
+        /// Bit length of encryption key
+        /// </summary>
+        public ushort Bitlen { get; set; }
+
+        /// <summary>
+        /// Processing flags
+        /// </summary>
+        public ushort Flags { get; set; }
+
+        /// <summary>
+        /// Certificate decryption extra field data
+        /// </summary>
+        /// <remarks>
+        /// Refer to the explanation for CertData
+        /// in the section describing the
+        /// Certificate Processing Method under
+        /// the Strong Encryption Specification
+        /// </remarks>
+        public byte[] CertData { get; set; } = [];
+    }
+}