feat: add poll and prediction commands for broadcasters (#6583)

Reviewed-by: nerix <nero.9@hotmail.de>
Reviewed-by: pajlada <rasmus.karlsson@pajlada.com>

mocks/include/mocks/Helix.hpp

@@ -7,6 +7,7 @@
 #include <QString>
 #include <QStringList>
 
+#include <chrono>
 #include <functional>
 #include <vector>
 
@@ -428,6 +429,22 @@ public:
          FailureCallback<QString> failureCallback),
         (override));
 
+    // create poll
+    MOCK_METHOD(void, createPoll,
+                (QString broadcasterID, QString title, QStringList choices,
+                 std::chrono::seconds duration, int pointsPerVote,
+                 ResultCallback<> successCallback,
+                 FailureCallback<QString> failureCallback),
+                (override));
+
+    // create prediction
+    MOCK_METHOD(void, createPrediction,
+                (QString broadcasterID, QString title, QStringList outcomes,
+                 std::chrono::seconds duration,
+                 ResultCallback<> successCallback,
+                 FailureCallback<QString> failureCallback),
+                (override));
+
     MOCK_METHOD(void, createEventSubSubscription,
                 (const eventsub::SubscriptionRequest &request,
                  const QString &sessionID,