Add support for more image uploader services (#1741)

The list of links that have been uploaded is now also stored in the json format instead of csv

src/common/NetworkRequest.hpp

@@ -3,6 +3,7 @@
 #include "common/NetworkCommon.hpp"
 #include "common/NetworkResult.hpp"
 
+#include <QHttpMultiPart>
 #include <memory>
 
 namespace chatterino {
@@ -52,6 +53,7 @@ public:
     NetworkRequest header(const char *headerName, const char *value) &&;
     NetworkRequest header(const char *headerName, const QByteArray &value) &&;
     NetworkRequest header(const char *headerName, const QString &value) &&;
+    NetworkRequest headerList(const QStringList &headers) &&;
     NetworkRequest timeout(int ms) &&;
     NetworkRequest concurrent() &&;
     NetworkRequest authorizeTwitchV5(const QString &clientID,