could you please add an option to disable all filetypes except the few I enable in the filetypes table

[gaven140]

Problem

An option to disable for all filetypes except the ones I explicitly enable in the filetypes table.

Expected behavior

filetypes = {
  all = false,
  lua = true,
  python = true,
  ...
}


-- OR
filetypes_disable_all = true,
filetypes = {
  -- filetypes to enable
}