Add the ability to disable the first indent line

[Libsod]

I think this plugin could easily be a more stable and faster replacement for indent-blankline.nvim, but for me personally I lack the ability to remove the first indent line. If such a feature is implemented, I will definitely switch :)

Just example:

Indent-blankline.nvim

indentmini.nvim

[glepnir]

seems like just add an option min level and check the level is bigger than min level.