refactor: load Twitch emotes from Helix (#5239)

mocks/include/mocks/EmptyApplication.hpp

@@ -257,6 +257,13 @@ public:
         return nullptr;
     }
 
+    ITwitchUsers *getTwitchUsers() override
+    {
+        assert(false && "EmptyApplication::getTwitchUsers was called without "
+                        "being initialized");
+        return nullptr;
+    }
+
     QTemporaryDir settingsDir;
     Paths paths_;
     Args args_;

mocks/include/mocks/Helix.hpp

@@ -410,6 +410,23 @@ public:
          (FailureCallback<HelixSendMessageError, QString> failureCallback)),
         (override));
 
+    // get user emotes
+    MOCK_METHOD(
+        void, getUserEmotes,
+        (QString userID, QString broadcasterID,
+         (ResultCallback<std::vector<HelixChannelEmote>, HelixPaginationState>
+              successCallback),
+         FailureCallback<QString> failureCallback, CancellationToken &&token),
+        (override));
+
+    // get followed channel
+    MOCK_METHOD(
+        void, getFollowedChannel,
+        (QString userID, QString broadcasterID,
+         ResultCallback<std::optional<HelixFollowedChannel>> successCallback,
+         FailureCallback<QString> failureCallback),
+        (override));
+
     MOCK_METHOD(void, update, (QString clientId, QString oauthToken),
                 (override));