Add custom hotkeys. (#2340)

Co-authored-by: LosFarmosCTL <80157503+LosFarmosCTL@users.noreply.github.com>
Co-authored-by: Paweł <zneix@zneix.eu>
Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/controllers/hotkeys/HotkeyHelpers.cpp

@@ -0,0 +1,30 @@
+#include "controllers/hotkeys/HotkeyHelpers.hpp"
+
+#include <QStringList>
+
+namespace chatterino {
+
+std::vector<QString> parseHotkeyArguments(QString argumentString)
+{
+    std::vector<QString> arguments;
+
+    argumentString = argumentString.trimmed();
+
+    if (argumentString.isEmpty())
+    {
+        // argumentString is empty, early out to ensure we don't end up with a vector with one empty element
+        return arguments;
+    }
+
+    auto argList = argumentString.split("\n");
+
+    // convert the QStringList to our preferred std::vector
+    for (const auto &arg : argList)
+    {
+        arguments.push_back(arg.trimmed());
+    }
+
+    return arguments;
+}
+
+}  // namespace chatterino