feature: Highlight group for Lualine components

[Isrothy]

Did you check the docs?

• [X] I have read all the trouble.nvim docs

Is your feature request related to a problem? Please describe.

I found the background color of the lualine component is inconsistant with my lualine config.

Describe the solution you'd like

Just like what aerial does

Describe alternatives you've considered

no

Additional context

No response

[folke]

This was harder than it should be, but was able to fix it. Check the readme about the lualine example and especially the hl_group option.