patch 9.1.0486: filetype: Snakemake files are not recognized

Problem:  filetype: Snakemake files are not recognized
Solution: Detect '*.smk' and Snakefile files as snakemake filetype
          (Riley Bruins)

See:
https://snakemake.readthedocs.io/en/stable/snakefiles/deployment.html#distribution-and-reproducibility

closes: #14992

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

.github/MAINTAINERS

@@ -225,6 +225,7 @@ runtime/ftplugin/sdoc.vim		@gpanders
 runtime/ftplugin/sed.vim		@dkearns
 runtime/ftplugin/sh.vim			@dkearns
 runtime/ftplugin/slint.vim		@ribru17
+runtime/ftplugin/snakemake.vim		@ribru17
 runtime/ftplugin/solidity.vim		@cothi
 runtime/ftplugin/solution.vim		@dkearns
 runtime/ftplugin/spec.vim		@ignatenkobrain

runtime/filetype.vim

@@ -2243,6 +2243,9 @@ au BufNewFile,BufRead *.smt,*.smith		setf smith
 " Smithy
 au BufNewFile,BufRead *.smithy			setf smithy
 
+" Snakemake
+au BufNewFile,BufRead Snakefile,*.smk		setf snakemake
+
 " Snobol4 and spitbol
 au BufNewFile,BufRead *.sno,*.spt		setf snobol4
 

runtime/ftplugin/snakemake.vim

@@ -0,0 +1,13 @@
+" Vim filetype plugin
+" Language:	snakemake
+" Maintainer:	Riley Bruins <ribru17@gmail.com>
+" Last Change:	2024 Jun 13
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setl comments=:# commentstring=#\ %s
+
+let b:undo_ftplugin = 'setl com< cms<'

src/testdir/test_filetype.vim

@@ -669,6 +669,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     smith: ['file.smt', 'file.smith'],
     smithy: ['file.smithy'],
     sml: ['file.sml'],
+    snakemake: ['file.smk', 'Snakefile'],
     snobol4: ['file.sno', 'file.spt'],
     solidity: ['file.sol'],
     solution: ['file.sln'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    486,
 /**/
     485,
 /**/