vim-patch:9.0.1978: No filetype detection for just files

Problem:  No filetype detection for just files
Solution: Detect just files (*.just, justfile, etc)

closes: vim/vim#13271

3d90f71b76

vim-patch:b6d01f13: runtime(just): Correct filetype detection pattern and style

Co-authored-by: dundargoc <gocdundar@gmail.com>

runtime/lua/vim/filetype.lua

@@ -565,6 +565,7 @@ local extension = {
   libsonnet = 'jsonnet',
   jsp = 'jsp',
   jl = 'julia',
+  just = 'just',
   kdl = 'kdl',
   kv = 'kivy',
   kix = 'kix',
@@ -1331,6 +1332,7 @@ local filename = {
   ['.jsfmtrc'] = 'jsonc',
   ['.jshintrc'] = 'jsonc',
   ['.swrc'] = 'jsonc',
+  ['.justfile'] = 'just',
   Kconfig = 'kconfig',
   ['Kconfig.debug'] = 'kconfig',
   ['lftp.conf'] = 'lftp',
@@ -1715,6 +1717,7 @@ local pattern = {
   ['org%.eclipse%..*%.prefs'] = 'jproperties',
   ['.*%.properties_.._.._.*'] = starsetf('jproperties'),
   ['[jt]sconfig.*%.json'] = 'jsonc',
+  ['[jJ]ustfile'] = 'just',
   ['Kconfig%..*'] = starsetf('kconfig'),
   ['.*%.[Ss][Uu][Bb]'] = 'krl',
   ['lilo%.conf.*'] = starsetf('lilo'),

test/old/testdir/test_filetype.vim

@@ -340,6 +340,7 @@ func s:GetFilenameChecks() abort
     \ 'jsonnet': ['file.jsonnet', 'file.libsonnet'],
     \ 'jsp': ['file.jsp'],
     \ 'julia': ['file.jl'],
+    \ 'just': ['justfile', 'Justfile', '.justfile', 'config.just'],
     \ 'kconfig': ['Kconfig', 'Kconfig.debug', 'Kconfig.file'],
     \ 'kdl': ['file.kdl'],
     \ 'kivy': ['file.kv'],