CLI: Add support for okon in offline HIBP checks

* Closes #5447
* Add option `--okon <okon-cli path>` to trigger the use of the okon cli tool to process a database's entries. When using this option the `-H, --hibp` option must point to a post-processed okon file instead of the standard HIBP text file.
* Updated documentation

src/cli/Analyze.h

@@ -27,6 +27,7 @@ public:
     int executeWithDatabase(QSharedPointer<Database> db, QSharedPointer<QCommandLineParser> parser) override;
 
     static const QCommandLineOption HIBPDatabaseOption;
+    static const QCommandLineOption OkonOption;
 
 private:
     void printHibpFinding(const Entry* entry, int count, QTextStream& out);