feat: Allow /xldev to disable Safe Mode (#2166)

- Adds new menu item to /xldev to disable Safe Mode, allowing users to load plugins again.
  - Safe mode cannot be re-enabled once disabled.
- Add new ModuleLog.Create<T> for eventual ILogger magic
- Make safe mode writable
- Remove redundant check in CheckPolicy

Dalamud/Interface/Internal/DalamudInterface.cs

@@ -1012,6 +1012,11 @@ internal class DalamudInterface : IInternalDisposableService
                         pluginManager.LoadBannedPlugins = !pluginManager.LoadBannedPlugins;
                     }
 
+                    if (pluginManager.SafeMode && ImGui.MenuItem("Disable Safe Mode"))
+                    {
+                        pluginManager.SafeMode = false;
+                    }
+
                     ImGui.Separator();
                     ImGui.MenuItem("API Level:" + PluginManager.DalamudApiLevel, false);
                     ImGui.MenuItem("Loaded plugins:" + pluginManager.InstalledPlugins.Count(), false);