fix(types): route.view can be empty / nil

[dsully]

Description

NoiceRouteConfig.view can be empty / nil as the check in M.add() sets it to nil if the view doesn't exist.

---@param route NoiceRouteConfig
---@param pos? number
function M.add(route, pos)
  local ret = {
    filter = route.filter,
    opts = route.opts or {},
    view = route.view and View.get_view(route.view, route.opts) or nil,
  }
  if ret.view == nil then
    ret.opts.skip = true
  end

[folke]

ty