Disable snippet source when completing a snippet?

[sharpchen]

Snippets are generally not needed when completing a snippet.

[sharpchen]

providers = {
  snippets = {
    min_keyword_length = 2,
    score_offset = 10,
    should_show_items = function(ctx)
      return ctx.trigger.initial_kind ~= 'trigger_character' and not require('blink.cmp').snippet_active()
    end,
  },
}