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

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

@@ -0,0 +1,14 @@
+" Vim filetype plugin file
+" Language:             unison
+" Maintainer:           Anton Parkhomenko <anton@chuwy.me>
+" Latest Revision:      2023-08-07
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl cms< isk<"
+
+setlocal commentstring=--\ %s
+setlocal iskeyword+=!,'