Feat: Component's icon accept function

[emxxjnm]

Requested feature

The component's icon accepts a function.

Motivation

python_env = {
  function()
    if vim.bo.filetype == "python" then
      local venv = vim.env.VIRTUAL_ENV
      if venv then
        local venv_name = fn.fnamemodify(venv, ":t")
        return string.format("(%s)", venv_name)
      end
    end
    return ""
  end,
  icon = function()
    local devicons = require("nvim-web-devicons")
    local icon, color = devicons.get_icon_color_by_filetype("python")
    return { icon, color = { fg = color } }
  end,
},

[NGPONG]

You can try this

  os = {
    function()
      return Tools.get_os()
    end,
    icon = setmetatable({}, {
      __index = function(_, k)
        local os = Tools.get_os()

        if k == 1 then
          return WBIcons.get_icons_by_operating_system()[os].icon
        elseif k == 'color' then
          return { fg = WBIcons.get_icons_by_operating_system()[os].color }
        end
      end
    }),
  },