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

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

@@ -0,0 +1,30 @@
+" Vim filetype plugin file
+" Language:             mutt RC File
+" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
+" Latest Revision:      2024-09-19 (simplify keywordprg #15696)
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let b:undo_ftplugin = "setl com< cms< inc< fo<"
+
+setlocal comments=:# commentstring=#\ %s
+setlocal formatoptions-=t formatoptions+=croql
+
+let &l:include = '^\s*source\>'
+
+if has('unix') && executable('less') && exists(':terminal') == 2
+  command -buffer -nargs=1 MuttrcKeywordPrg
+        \ silent exe 'term ' . 'env LESS= MANPAGER="less --pattern=''' . escape('^\s+' . <q-args> . '\b', '\') . ''' --hilite-search" man ' . 'muttrc'
+  setlocal iskeyword+=-
+  setlocal keywordprg=:MuttrcKeywordPrg
+  let b:undo_ftplugin .= '| setlocal keywordprg< iskeyword< | sil! delc -buffer MuttrcKeywordPrg'
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save