add brew widget

[thomasbecker]

'cause I missed it in the lua config. Thx Felix for all the awesome work you do!

[MicahBird]

This is awesome! Thanks for making this! I might suggest that you also add the following icons to your PR since it didn't quite work out of the box! :)

local settings = require("settings")

local icons = {
  sf_symbols = {
    ...
    brew = {
	full = "􀐛",
	empty = "􀐚",
	},
    ...