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

gitportable/usr/share/vim/vim91/plugin/spellfile.vim

@@ -0,0 +1,16 @@
+" Vim plugin for downloading spell files
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2023 Aug 10
+" Former Maintainer:	Bram Moolenaar <Bram@vim.org>
+
+" Exit quickly when:
+" - this plugin was already loaded
+" - when 'compatible' is set
+" - some autocommands are already taking care of spell files
+if exists("loaded_spellfile_plugin") || &cp || exists("#SpellFileMissing")
+  finish
+endif
+let loaded_spellfile_plugin = 1
+
+" The function is in the autoload directory.
+autocmd SpellFileMissing * call spellfile#LoadFile(expand('<amatch>'))