Lazygit/Terminals don't respect theme transparency

[r-darwish]

I tried using https://github.com/sainnhe/gruvbox-material and set it's transparency mode:

{
    "sainnhe/gruvbox-material",
    config = function()
      vim.g.gruvbox_material_enable_italic = true
      vim.g.gruvbox_material_transparent_background = 2
    end,
}

It seems that this theme supports terminal transparency, which works when launching :terminal, but doesn't work with Snack's lazygit or terminal

[r-darwish]

  local function set_normal_float_highlight()
    vim.api.nvim_set_hl(0, "NormalFloat", { bg = "NONE" })
  end

  vim.api.nvim_create_autocmd("ColorScheme", {
    pattern = "*",
    callback = set_normal_float_highlight,
  })

This fixes it.