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

gitportable/usr/share/vim/vim91/ftplugin/m3build.vim

@@ -0,0 +1,27 @@
+" Vim filetype plugin file
+" Language:	Modula-3 Makefile
+" Maintainer:	Doug Kearns <dougkearns@gmail.com>
+" Last Change:	2024 Jan 14
+
+if exists("b:did_ftplugin")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+runtime! ftplugin/m3quake.vim
+
+if (has("gui_win32") || has("gui_gtk")) && exists("b:m3quake_set_browsefilter")
+  let b:browsefilter = "Modula-3 Makefile (m3makefile, m3overrides)\tm3makefile;m3overrides\n"
+  if has("win32")
+    let b:browsefilter ..= "All Files (*.*)\t*\n"
+  else
+    let b:browsefilter ..= "All Files (*)\t*\n"
+  endif
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: nowrap sw=2 sts=2 ts=8 noet: