feat: add support for snacks.nvim

[mikededo]

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

snacks.nvim is a new QoL plugin, used by default in LazyVim over a collection of separate plugins. Currently, the highlights provided by this plugin are not supported.

Describe the solution you'd like

To implement the highlight tokens specified in here

[rkaminsk]

Hi, I would also like to see an integration here. Catppuccin does not play nice with snacks.notify because the borders of messages are set in italic, which looks ugly. My current workaround (for lazy.vim) is to patch some highlight groups:

return {
    "catppuccin/nvim",
    name = "catppuccin",
    priority = 1000,
    opts = {
      custom_highlights = function(colors)
        return {
          DiagnosticInfo = { style = {} },
          DiagnosticError = { style = {} },
          DiagnosticWarn = { style = {} },
        }
      end,
    },
  }

[mikededo]

Hey @rkaminsk, could you check if what's been implemented in #807 would work as you expect?

[rkaminsk]

@mikededo, yes your PR works.

PS: the default indicator, which is also a |, set with bufferline.nvim is also set in italic. Since all my attempts to configure this properly failed, I simply set

highlight BufferlineIndicatorSelected gui=bold

at the end of my config. This is of course unrelated to snacks.nvim.

PPS: In case, someone wants to fix the bufferline in a slightly better way:

return {
  "akinsho/bufferline.nvim",
  after = "catppuccin",
  opts = {
    highlights = require("catppuccin.groups.integrations.bufferline").get({
      custom = {
        all = {
          indicator_visible = { style = { "bold" } },
          indicator_selected = { style = { "bold" } },
        },
      },
    }),
  },
}