Add all vim filetypes

ftplugin/nroff.vim

@@ -0,0 +1,15 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nroff') == -1
+
+" Vim filetype plugin
+" Language:	roff(7)
+" Maintainer:	Chris Spiegel <cspiegel@gmail.com>
+" Last Change:	2019 Apr 24
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal commentstring=.\\\"%s
+
+endif