dist: transpile cfilter.vim => cfilter.lua #21662

Vim has changed cfilter.vim from vimscript to vim9script.
Nvim supports only vimscript, not vim9script.

runtime/lua/_vim9script.lua

@@ -27,6 +27,29 @@ local vim9 = (function()
     end
   end
 
+  M.fn_ref = function(module, name, copied, ...)
+    for _, val in ipairs({ ... }) do
+      table.insert(copied, val)
+    end
+
+    local funcref = name
+    if type(funcref) == 'function' then
+      return funcref(unpack(copied))
+    elseif type(funcref) == 'string' then
+      if vim.fn.exists('*' .. funcref) == 1 then
+        return vim.fn[funcref](unpack(copied))
+      end
+
+      if module[funcref] then
+        module[funcref](unpack(copied))
+      end
+
+      error('unknown function: ' .. funcref)
+    else
+      error(string.format('unable to call funcref: %s', funcref))
+    end
+  end
+
   M.fn_mut = function(name, args, info)
     local result = vim.fn._Vim9ScriptFn(name, args)
     for idx, val in pairs(result[2]) do