Move mocks to their own interface (#4645)

benchmarks/src/main.cpp

@@ -1,13 +1,20 @@
+#include "singletons/Settings.hpp"
+
 #include <benchmark/benchmark.h>
 #include <QApplication>
 #include <QtConcurrent>
 
+using namespace chatterino;
+
 int main(int argc, char **argv)
 {
     QApplication app(argc, argv);
 
     ::benchmark::Initialize(&argc, argv);
 
+    // Ensure settings are initialized before any tests are run
+    chatterino::Settings settings("/tmp/c2-empty-test");
+
     QtConcurrent::run([&app] {
         ::benchmark::RunSpecifiedBenchmarks();