[Client] Add moderation tab with investigate, password reset, and avatar removal

- New Moderation tab: search a user to show account info, alternate
  accounts, login sessions, and staff last logins; actions to reset the
  user's password (shows the generated temporary password) and remove the
  user's avatar
- 'Investigate user' entry in the user context menu opens the tab pre-loaded
  for that user
- Warning dialog shows the infraction level of each warning category
- Tab wired into TabSupervisor with a moderator-gated menu action, shortcut,
  and tabs.ini persistence (default closed)

libcockatrice_interfaces/libcockatrice/interfaces/interface_tabs_settings_provider.h

@@ -20,6 +20,7 @@ public:
     [[nodiscard]] virtual bool getTabAdminOpen() const = 0;
     [[nodiscard]] virtual bool getTabLogOpen() const = 0;
     [[nodiscard]] virtual bool getTabReportOpen() const = 0;
+    [[nodiscard]] virtual bool getTabModerationOpen() const = 0;
 };
 
 #endif // COCKATRICE_INTERFACE_TABS_SETTINGS_PROVIDER_H