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

gitportable/usr/share/vim/vim91/compiler/onsgmls.vim

@@ -0,0 +1,21 @@
+" Vim compiler file
+" Compiler:	onsgmls
+" Maintainer:	Robert Rowsome <rowsome@wam.umd.edu>
+" Last Change:	2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "onsgmls"
+
+let s:cpo_save = &cpo
+set cpo-=C
+
+CompilerSet makeprg=onsgmls\ -s\ %:S
+
+CompilerSet errorformat=onsgmls:%f:%l:%c:%t:%m,
+		    \onsgmls:%f:%l:%c:%m
+
+let &cpo = s:cpo_save
+unlet s:cpo_save