runtime(nickel): Add filetype plugin with com, cms settings

closes: #19545

Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

.github/MAINTAINERS

@@ -263,6 +263,7 @@ runtime/ftplugin/mojo.vim				@ribru17
 runtime/ftplugin/mp.vim					@lifepillar
 runtime/ftplugin/mss.vim				@Freed-Wu
 runtime/ftplugin/nginx.vim				@chr4
+runtime/ftplugin/nickel.vim				@ribru17
 runtime/ftplugin/nim.vim				@ribru17
 runtime/ftplugin/nroff.vim				@averms
 runtime/ftplugin/nsis.vim				@k-takata

runtime/ftplugin/nickel.vim

@@ -0,0 +1,13 @@
+" Vim filetype plugin
+" Language:	nickel
+" Maintainer:	Riley Bruins <ribru17@gmail.com>
+" Last Change:	2026 Mar 01
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setl comments=:# commentstring=#\ %s
+
+let b:undo_ftplugin = 'setl com< cms<'