neovim: use listchars instead of indent-blankline plugin

neovim/.config/nvim/after/plugin/options.lua

@@ -41,3 +41,5 @@ opt.colorcolumn = "120"
 opt.autoread = true
 opt.showmode = false
 opt.redrawtime = 4000
+opt.list = true
+opt.listchars = { space = "·", tab = ">~" }

neovim/.config/nvim/after/plugin/theme.lua

@@ -6,15 +6,6 @@ vim.api.nvim_set_hl(0, "SpellBad", {
   fg = "red",
 })
 
-vim.api.nvim_set_hl(0, "IndentBlanklineChar", {
-  fg = "#373737",
-  bg = "none",
-})
-vim.api.nvim_set_hl(0, "IndentBlanklineContextChar", {
-  fg = "#808080",
-  bg = "none",
-})
-
 vim.cmd([[
 colorscheme gruvbox-material
 hi clear SignColumn