Expose annotation appearance streams and appearance state as public

src/UglyToad.PdfPig/Annotations/Annotation.cs

@@ -83,6 +83,26 @@ public class Annotation
         /// </summary>
         public bool HasDownAppearance => downAppearanceStream != null;
 
+        /// <summary>
+        /// The normal appearance stream for this annotation, if any. Each appearance is a Form XObject.
+        /// </summary>
+        public AppearanceStream? NormalAppearance => normalAppearanceStream;
+
+        /// <summary>
+        /// The roll-over appearance stream (shown on hover), if any.
+        /// </summary>
+        public AppearanceStream? RollOverAppearance => rollOverAppearanceStream;
+
+        /// <summary>
+        /// The down appearance stream (shown on click), if any.
+        /// </summary>
+        public AppearanceStream? DownAppearance => downAppearanceStream;
+
+        /// <summary>
+        /// The current appearance state name, if any.
+        /// </summary>
+        public string? AppearanceState => appearanceState;
+
         /// <summary>
         /// The <see cref="Annotation"/> this annotation was in reply to. Can be <see langword="null" />
         /// </summary>

src/UglyToad.PdfPig/Annotations/AppearanceStream.cs

@@ -21,6 +21,11 @@ public class AppearanceStream
         /// </summary>
         public bool IsStateless => statelessAppearanceStream != null;
 
+        /// <summary>
+        /// The stateless appearance stream, if this appearance stream is stateless.
+        /// </summary>
+        public StreamToken? StatelessAppearanceStream => statelessAppearanceStream;
+
         /// <summary>
         /// Get list of states. If this is a stateless appearance stream, an empty collection is returned.
         /// </summary>