feat: add --safe-mode command line option (#4985)

This ensures the settings button isn't hidden, and disables plugins from being loaded to make sure the user can always recover from messing things up

src/common/Args.cpp

@@ -38,6 +38,9 @@ Args::Args(const QApplication &app)
                                       "Attaches to the Console on windows, "
                                       "allowing you to see debug output."});
     crashRecoveryOption.setFlags(QCommandLineOption::HiddenFromHelp);
+    QCommandLineOption safeModeOption(
+        "safe-mode", "Starts Chatterino without loading Plugins and always "
+                     "show the settings button.");
 
     parser.addOptions({
         {{"V", "version"}, "Displays version information."},
@@ -45,6 +48,7 @@ Args::Args(const QApplication &app)
         parentWindowOption,
         parentWindowIdOption,
         verboseOption,
+        safeModeOption,
     });
     parser.addOption(QCommandLineOption(
         {"c", "channels"},
@@ -89,6 +93,10 @@ Args::Args(const QApplication &app)
 
         this->parentWindowId = parser.value(parentWindowIdOption).toULongLong();
     }
+    if (parser.isSet(safeModeOption))
+    {
+        this->safeMode = true;
+    }
 }
 
 void Args::applyCustomChannelLayout(const QString &argValue)

src/common/Args.hpp

@@ -26,6 +26,7 @@ public:
     bool dontLoadMainWindow{};
     std::optional<WindowLayout> customChannelLayout;
     bool verbose{};
+    bool safeMode{};
 
 private:
     void applyCustomChannelLayout(const QString &argValue);