refactor: move NetJob away from ModModel to ModAPI

This is done so that 1. ModAPI behaves more like an actual API instead
of just a helper, and 2. Allows for more easily creating other mod
providers that may or may not use network tasks (foreshadowing lol)

launcher/ui/pages/modplatform/modrinth/ModrinthModel.cpp

@@ -10,19 +10,10 @@ ListModel::ListModel(ModrinthPage* parent) : ModPlatform::ListModel(parent) {}
 
 ListModel::~ListModel() {}
 
-void Modrinth::ListModel::searchRequestFinished()
+void Modrinth::ListModel::searchRequestFinished(QJsonDocument& doc)
 {
     jobPtr.reset();
-
-    QJsonParseError parse_error;
-    QJsonDocument doc = QJsonDocument::fromJson(response, &parse_error);
-    if (parse_error.error != QJsonParseError::NoError) {
-        qWarning() << "Error while parsing JSON response from Modrinth at " << parse_error.offset
-                   << " reason: " << parse_error.errorString();
-        qWarning() << response;
-        return;
-    }
-
+    
     QList<ModPlatform::IndexedPack> newList;
     auto packs = doc.object().value("hits").toArray();
     for (auto packRaw : packs) {