feat(Man): port to Lua (#19912)

Co-authored-by: zeertzjq <zeertzjq@outlook.com>

runtime/plugin/man.lua

@@ -0,0 +1,34 @@
+if vim.g.loaded_man ~= nil then
+  return
+end
+vim.g.loaded_man = true
+
+vim.api.nvim_create_user_command('Man', function(params)
+  local man = require('man')
+  if params.bang then
+    man.init_pager()
+  else
+    local ok, err = pcall(man.open_page, params.count, params.smods, params.fargs)
+    if not ok then
+      vim.notify(man.errormsg or err, vim.log.levels.ERROR)
+    end
+  end
+end, {
+  bang = true,
+  bar = true,
+  addr = 'other',
+  nargs = '*',
+  complete = function(...)
+    return require('man').man_complete(...)
+  end,
+})
+
+local augroup = vim.api.nvim_create_augroup('man', {})
+
+vim.api.nvim_create_autocmd('BufReadCmd', {
+  group = augroup,
+  pattern = 'man://*',
+  callback = function(params)
+    require('man').read_page(vim.fn.matchstr(params.match, 'man://\\zs.*'))
+  end,
+})

runtime/plugin/man.vim

@@ -1,15 +0,0 @@
-" Maintainer: Anmol Sethi <hi@nhooyr.io>
-
-if exists('g:loaded_man')
-  finish
-endif
-let g:loaded_man = 1
-
-command! -bang -bar -addr=other -complete=customlist,man#complete -nargs=* Man
-      \ if <bang>0 | call man#init_pager() |
-      \ else | call man#open_page(<count>, <q-mods>, <f-args>) | endif
-
-augroup man
-  autocmd!
-  autocmd BufReadCmd man://* call man#read_page(matchstr(expand('<amatch>'), 'man://\zs.*'))
-augroup END