patch 9.2.0204: filetype: cps files are not recognized

Problem:  filetype: cps files are not recognized
Solution: Detect *.cps files as json filetype (Guillaume Barbier).

Reference:
https://github.com/cps-org/cps
https://cps-org.github.io/cps/

closes: #19758

Signed-off-by: Guillaume Barbier <barbier.guillaume60@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/autoload/dist/ft.vim

@@ -3,7 +3,7 @@ vim9script
 # Vim functions for file type detection
 #
 # Maintainer:		The Vim Project <https://github.com/vim/vim>
-# Last Change:		2026 Mar 13
+# Last Change:		2026 Mar 19
 # Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 # These functions are moved here from runtime/filetype.vim to make startup
@@ -1789,6 +1789,8 @@ const ft_from_ext = {
   "cairo": "cairo",
   # Cap'n Proto
   "capnp": "capnp",
+  # Common Package Specification
+  "cps": "json",
   # C#
   "cs": "cs",
   "csx": "cs",

src/testdir/test_filetype.vim

@@ -419,7 +419,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     jovial: ['file.jov', 'file.j73', 'file.jovial'],
     jproperties: ['file.properties', 'file.properties_xx', 'file.properties_xx_xx', 'some.properties_xx_xx_file', 'org.eclipse.xyz.prefs'],
     jq: ['file.jq'],
-    json: ['file.json', 'file.jsonp', 'file.json-patch', 'file.geojson', 'file.webmanifest', 'Pipfile.lock', 'file.ipynb', 'file.jupyterlab-settings',
+    json: ['file.json', 'file.jsonp', 'file.json-patch', 'file.geojson', 'file.webmanifest', 'Pipfile.lock', 'file.ipynb', 'file.jupyterlab-settings', 'file.cps',
     '.prettierrc', '.firebaserc', '.stylelintrc', '.lintstagedrc', 'file.slnf', 'file.sublime-project', 'file.sublime-settings', 'file.sublime-workspace',
     'file.bd', 'file.bda', 'file.xci', 'flake.lock', 'pack.mcmeta', 'deno.lock', '.swcrc', 'composer.lock', 'symfony.lock'],
     json5: ['file.json5'],

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    204,
 /**/
     203,
 /**/