made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/ftplugin.vim

@@ -0,0 +1,44 @@
+vim9script noclear
+
+# Vim support file to switch on loading plugins for file types
+#
+# Maintainer:	The Vim Project <https://github.com/vim/vim>
+# Last change:	2023 Aug 10
+# Former Maintainer:	Bram Moolenaar <Bram@vim.org>
+
+if exists("g:did_load_ftplugin")
+  finish
+endif
+g:did_load_ftplugin = 1
+
+augroup filetypeplugin
+  au FileType * call LoadFTPlugin()
+augroup END
+
+if exists('*LoadFTPlugin')
+  # No need to define the function again.
+  finish
+endif
+
+def LoadFTPlugin()
+  if exists("b:undo_ftplugin")
+    # We assume b:undo_ftplugin is using legacy script syntax
+    legacy exe b:undo_ftplugin
+    unlet! b:undo_ftplugin b:did_ftplugin
+  endif
+
+  var s = expand("<amatch>")
+  if s != ""
+    if &cpo =~# "S" && exists("b:did_ftplugin")
+      # In compatible mode options are reset to the global values, need to
+      # set the local values also when a plugin was already used.
+      unlet b:did_ftplugin
+    endif
+
+    # When there is a dot it is used to separate filetype names.  Thus for
+    # "aaa.bbb" load "aaa" and then "bbb".
+    for name in split(s, '\.')
+      exe 'runtime! ftplugin/' .. name .. '.vim ftplugin/' .. name .. '_*.vim ftplugin/' .. name .. '/*.vim'
+    endfor
+  endif
+enddef