cd command: open files with more wcx plugins

[DrShark]

With cd command it's already possible to open file as directory if the wcx plugin for it tweaked to open files with Enter key.
My suggestions:
1. If a [path to ] file name after cd command ends with / or \ character (like cd c:\windows\notepad.exe\), try to open it as directory with plugin that opens it using Ctrl+PgDn hotkey.
2. To use even more plugins, the feature of using an extension assigned to a plugin in [PackerPlugins] section of wincmd.ini or just the internal assocoitions filter name from [Associations] section of wincmd.ini as a cd command parameter to open file with any wcx may be added too. This will make it possible to use any wcx plugin not only in internal context menu, but also in buttons and TC command line. The cd command with such parameter may look like this (example to call NTFS Stream wcx plugin):
cd ""c:\windows\notepad.exe/" e:stream"
(here the registered extension used)
or
cd ""c:\windows\notepad.exe/" "f:Filter1_NTFS Streams""
(here internal associations filter name used)