Added default formatters (#908)

* added default formatters for a couple of langs

* fix: sugesstions from tastyep

* allow users to change default formatters

* suggestion: mellow pointed out the telescope issue

* we don't need to use formatter.setup

ftplugin/lua.lua

@@ -1,11 +1,9 @@
 O.formatters.filetype["lua"] = {
-  -- prettier
   function()
     return {
-      exe = "stylua",
-      --  TODO: append to this for args don't overwrite
-      args = {},
-      stdin = false,
+      exe = O.lang.lua.formatter.exe,
+      args = O.lang.lua.formatter.args,
+      stdin = not (O.lang.lua.formatter.stdin ~= nil),
     }
   end,
 }
@@ -48,16 +46,4 @@ if not require("lv-utils").check_lsp_client_active "sumneko_lua" then
   }
 end
 
-if O.lang.lua.autoformat then
-  require("lv-utils").define_augroups {
-    _lua_autoformat = {
-      {
-        "BufWritePre",
-        "*.lua",
-        "lua vim.lsp.buf.formatting_sync(nil, 1000)",
-      },
-    },
-  }
-end
-
 vim.cmd "setl ts=2 sw=2"