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

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

@@ -0,0 +1,10 @@
+" Vim filetype plugin file
+" Language:	MLIR
+
+if exists("b:did_ftplugin") | finish | endif
+let b:did_ftplugin = 1
+
+setl comments=:///,://
+setl commentstring=//\ %s
+
+let b:undo_ftplugin = "setl commentstring< comments<"