feat: epub bookmarks (#1337)

Co-authored-by: vedi0boy <nate@origin8publishing.com>
Co-authored-by: Uri Tauber <uritaube@gmail.com>

src/JsonSettingsIO.h

@@ -1,10 +1,13 @@
 #pragma once
 
+#include <vector>
+
 class CrossPointSettings;
 class CrossPointState;
 class WifiCredentialStore;
 class RecentBooksStore;
 class OpdsServerStore;
+struct BookmarkEntry;
 
 namespace JsonSettingsIO {
 
@@ -28,4 +31,8 @@ bool loadRecentBooks(RecentBooksStore& store, const char* json);
 bool saveOpds(const OpdsServerStore& store, const char* path);
 bool loadOpds(OpdsServerStore& store, const char* json, bool* needsResave = nullptr);
 
+// Bookmarks
+bool saveBookmarks(const std::vector<BookmarkEntry>& bookmarks, const char* path);
+bool loadBookmarks(std::vector<BookmarkEntry>& bookmarks, const char* json);
+
 }  // namespace JsonSettingsIO