Added share and unshare bookmarks

lib/models/data/patch_bookmark_data.dart

@@ -0,0 +1,50 @@
+class PatchBookmarkData {
+  final String? url;
+  final String? title;
+  final String? description;
+  final bool? isArchived;
+  final bool? unread;
+  final bool? shared;
+  final String? tagNames;
+  final String? notes;
+
+  const PatchBookmarkData({
+    this.url,
+    this.title,
+    this.description,
+    this.isArchived,
+    this.unread,
+    this.shared,
+    this.tagNames,
+    this.notes,
+  });
+
+  Map<String, dynamic> toJson() {
+    Map<String, dynamic> ret = {};
+    if (url != null) {
+      ret = {...ret, "url": url};
+    }
+    if (title != null) {
+      ret = {...ret, "title": title};
+    }
+    if (description != null) {
+      ret = {...ret, "description": description};
+    }
+    if (isArchived != null) {
+      ret = {...ret, "is_archived": isArchived};
+    }
+    if (unread != null) {
+      ret = {...ret, "unread": unread};
+    }
+    if (shared != null) {
+      ret = {...ret, "shared": shared};
+    }
+    if (notes != null) {
+      ret = {...ret, "notes": notes};
+    }
+    if (tagNames != null) {
+      ret = {...ret, "notag_namestes": tagNames};
+    }
+    return ret;
+  }
+}