Add OpenText/brother installers and update printer installer scripts

- New PrinterInstaller support for Brother MFC-J series (driver source,
  DSI files; binaries gitignored)
- New OpenText HostExplorer 15 installer (profiles, shortcuts, .iss;
  .exe/.cab/.msi gitignored)
- New HP printer driver support files (.gpd/.cfg/.xml/.dtd) for 3556
  model series
- PrinterInstaller.iss rework with additional driver paths
- FQDNUpdate, MachineAuth, XeroxOfflineInstaller minor updates

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

OpenText/source/HostExplorer/Menu/Default Shop.hmv

@@ -0,0 +1,23 @@
+[Version]
+AssemblyVersion=1
+[Console]
+Title=HostExplorer Menu Editor
+IconPath=HumCSSPlugins.HumCSSActiveTunnelsPlugin
+IconID=IDI_CSS_CONSOLE
+[Attributes]
+SupportAssemblyEditing=1
+SupportSeparator=1
+ParentLevels=100
+[Parent Node]
+name=Menu
+[SubParent Node]
+name=Submenu
+[Child Node]
+name=Menu Option
+[Messages]
+Create New Parent=Create New Menu
+Create New SubParent=Create New Submenu
+Insert New Parent=Insert New Menu
+Insert New SubParent=Insert New Submenu
+[Root Group]
+Name=Menu