vim-patch:9.0.1807: runtime: crystal scripts not recognised (#24949)

Problem:  runtime: crystal scripts not recognised
Solution: Filetype detect Crystal scripts by shebang line

closes: vim/vim#12935

9b73902dbe

Co-authored-by: Doug Kearns <dougkearns@gmail.com>

runtime/lua/vim/filetype/detect.lua

@@ -1636,6 +1636,7 @@ local patterns_hashbang = {
   ['icon\\>'] = { 'icon', { vim_regex = true } },
   guile = 'scheme',
   ['nix%-shell'] = 'nix',
+  ['crystal\\>'] = { 'crystal', { vim_regex = true } },
 }
 
 ---@private