patch 9.1.0279: filetype: roc files are not recognized

Problem:  filetype: roc files are not recognized
Solution: Detect '*.roc' files as roc filetype,
          add a basic filetype plugin (nat-418)

closes: #14416

Signed-off-by: nat-418 <93013864+nat-418@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -1888,6 +1888,9 @@ au BufNewFile,BufRead *.robot,*.resource	setf robot
 " Robots.txt
 au BufNewFile,BufRead robots.txt		setf robots
 
+" Roc
+au BufNewFile,BufRead *.roc			setf roc
+
 " RON (Rusty Object Notation)
 au BufNewFile,BufRead *.ron			setf ron
 

runtime/ftplugin/roc.vim

@@ -0,0 +1,14 @@
+" Roc filetype plugin file
+" Language: Roc
+" Maintainer: nat-418 <93013864+nat-418@users.noreply.github.com>
+" Latest Revision: 2024-04-5
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal comments=:##,:#
+setlocal commentstring=#\ %s
+
+let b:undo_ftplugin = "setl com< cms<"

src/testdir/test_filetype.vim

@@ -597,6 +597,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     rpgle: ['file.rpgle', 'file.rpgleinc'],
     robot: ['file.robot', 'file.resource'],
     robots: ['robots.txt'],
+    roc: ['file.roc'],
     ron: ['file.ron'],
     routeros: ['file.rsc'],
     rpcgen: ['file.x'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    279,
 /**/
     278,
 /**/